NU-PD 21001 Boots Safety GP and FD.pdf

INCH-POUND

NU-PD 21001

CAGE Code 32263 22 February 2021

PURCHASE DESCRIPTION

BOOTS, SAFETY, GENERAL PURPOSE AND FLIGHT DECK

This purchase description is approved for use by the Navy Clothing and Textile Research Facility, Department of the Navy.

1. SCOPE

1.1 Scope. This purchase description covers the requirements for general purpose and flight deck safety toe boots worn by the Department of the Navy personnel.

1.2. Classification. The boots are of one type and available in the following classes; whole, half sizes and widths; for both male and female (see 6.2).

1.2.1. Classes. The boots will be furnished in the following classes as specified (see 6.2).

Class 1 – Black Class 2 – Aviator Brown 3763

1.2.2. Schedule of sizes and widths. The boots will be furnished in the following sizes.

Men’s - sizes 6 through 16 inclusive; and widths Narrow (B), Regular/Medium (D), Wide (EE), Extra Wide (EEE).

Women’s - sizes 4 through 12 inclusive; and widths Narrow (B), Regular/Medium (D), Wide (EE), Extra Wide (EEE).

Comments, suggestions, or questions on this document should be addressed to (fill in mailing address) or emailed to (fill in email address). Since contract information can change, you may want to verify the currency of this address information using ASSIST Online database at https://assist.dla.mil.

AMSC N/A FSC 8430

DISTRIBUTION STATEMENT A. Approved for public release.

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3 and 4 of this purchase description. This section does not include documents in other sections of this purchase description or recommended for additional information as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents listed in sections 3 and 4 of this purchase description, whether they are listed or not.

2.2 Government documents.

2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the solicitation or contract. (See 6.2).

COMMERCIAL ITEM DESCRIPTION

A-A-55093 -Laces, Nylon

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-PRF-3122 - Leather, Cattlehide, for Footwear Uppers and Gusset, Chrome Tanned, Fatliquored MIL-DTL-32075 – Label: For Clothing, Equipage and Tentage (General Use)

(Copies of these documents are available online at https://quicksearch.dla.mil).

2.2.2 Other Government documents, drawings and publications. The following other Government documents, drawings and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issue of these documents are those cited in the solicitation or contract.

DRAWINGS

U.S. ARMY NATICK RESEARCH AND DEVELOPMENT CENTER, NATICK, MA

2-1-1635 -Speed Lace Assembly

U.S. NAVY CLOTHING AND TEXTILE RESEARCH FACILITY, NATICK, MA

06-NCTRF-20 -Boots, Safety, General Purpose and Flight Deck

(Copies of these drawings are available from the procurement agency).

2.3 Non-government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC)

AATCC Evaluation Procedure 9, Visual Assessment of Color Differences of Textiles

(Copies are available on line at https://www.aatcc.org).

AMERICAN SOCIETY FOR QUALITY (ASQ)

ANSI/ASQ A1.4 - Sampling Procedures and Tables for Inspection by Attributes

(Copies of this document are available online at https://www.asq.org).

ASTM INTERNATIONAL

ASTM D471 - Standard Test Method for Rubber Property-Effect of Liquids ASTM D624 - Standard Test Method for Tear Strength of Conventional Vulcanized

Rubber and Thermoplastic Elastomers ASTM D1052 - Standard Test Methods for Measuring Rubber Deterioration-Cut Growth

Using Ross Flexing Apparatus ASTM D1776/D1776M- Standard Practice for Conditioning Textiles for Testing ASTM D1777 - Standard Test Method for Thickness of Textile Materials ASTM D1813 - Standard Test Method for Measuring Thickness of Leather Test

Specimens ASTM D2208 - Standard Test Method for Breaking Strength of Leather by the Grab

Method ASTM D2240 - Standard Test Methods for Rubber Property - Durometer Hardness ASTM D3273 - Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings and in an Environmental Chamber ASTM D3574 - Standard Test Methods for Flexible Cellular Materials – Slab, Bonded, Molded Urethane Foams ASTM D3776/D3776M- Standard Test Methods for Mass Per Unit Area (Weight) of Fabric ASTM D3787 - Standard Test Method for Bursting Strength of Textiles – Constant-Rate-of-Traverse (CRT) Ball Burst Method ASTM D4786 - Standard Test Method for Stitch Tear Strength, Single Hole ASTM D4966 - Standard Test Method for Abrasion Resistance of Textile Fabrics

(Martindale Abrasion Tester Method) ASTM D5963 - Standard Test Method for Rubber Property- Abrasion Resistance (Rotary

Drum Abrader) ASTM D6797 - Standard Test Method for Bursting Strength of Fabrics Constant-Rate-of-

Extension (CRE) Ball Burst Test ASTM F2412 - Standard Test Methods for Foot Protection ASTM F2413 - Standard Specification for Performance Requirements for Protective

(Safety) Toe Cap Footwear https://www.aatcc.org/ https://ewb.ihs.com/#/document/FFDIGGAAAAAAAAAA?qid=637261114382548252&sr=re-1-10&kbid=4%7C20027&docid=943755020 https://ewb.ihs.com/#/document/FFDIGGAAAAAAAAAA?qid=637261114382548252&sr=re-1-10&kbid=4%7C20027&docid=943755020

ASTM F2913 - Standard Test Method for Measuring the Coefficient of Friction for Evaluation of Slip Performance of Footwear and Test Surfaces/Flooring Using a Whole Shoe Tester

(Copies of these documents are available online at https://www.astm.org).

SATRA TECHNOLOGY CENTER

SATRA TM2 - Tensile Properties of Insole Materials SATRA TM3 - Flexing Index SATRA TM6 - Water Absorption and Desorption –Total Immersion Method SATRA TM31 - Abrasion Resistance – Martindale Method SATRA TM36 - Break/Pipiness SATRA TM80 - Transverse Tensile Strength of Sheet Materials SATRA TM83 - Measurement Of The Area Shape Retention And Collapsing Load Of Formed Box Toe (Toe Puff) And Counter (Stiffener) Materials SATRA TM98 - Dimensional Stability With Changes In Atmospheric Humidity SATRA TM101 - Surface Peel Strength Of Insole Materials SATRA TM223 - Floor Marking By Solings Or Top Pieces

(Copies of these documents are available online at https://www.satra.co.uk).

NATIONAL FIRE PROTECTION ASSOCIATION

NFPA 1971 - Standard on Protective Ensembles for Structural Fire Fighting and Proximity

Fire Fighting

(Copies of this document are available online at https://www.nfpa.org).

ENVIRONMENTAL PROTECTION AGENCY (EPA)

EPA Pesticide Registration Manual

(Copies of this document are available online at https://www.epa.gov/pesticide-registration/antimicrobial-pesticide-registration).

2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 First article. When specified (see 6.2) a sample shall be subjected to first article inspection in accordance with 4.3.

https://www.nfpa.org/ https://www.epa.gov/pesticide-registration/antimicrobial-pesticide-registration https://www.epa.gov/pesticide-registration/antimicrobial-pesticide-registration

3.2 Standard samples, materials and components. The Class 2 brown leather shall match a shade standard roll Aviator Brown 3763 (cattlehide leather) for shade. The materials and components shall conform to applicable specifications, standards, and drawings as specified herein. Unless otherwise specified, the components for the brown boot shall be black. If no color is specified, color shall be natural.

3.2.1 Recycled, recovered, or environmentally preferable materials. Where applicable, recycled materials may be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements and promotes economically advantageous life cycle costs.

3.2.2 Leather upper design. The leather for the uppers shall be full grain, drum dyed Class 1 black or Class 2 aviator brown 3763, with color penetration throughout the thickness of the hide and conform to Type I, Treatment A and Treatment B of MIL-PRF-3122 Class 1. Leather for the gusset-tongue, eyelet stays, quarter, and cushion collar shall conform to MIL-PRF-3122, Type II, Class 1, Treatment A, with a soft temper. The break of vamp or quarter leather shall not be greater than No. 5 on SATRA Break Scale Method. As an alternate, leather for the inner and outer eyelet stays shall conform to MIL-PRF-3122, Type I, Class 1, Treatment A and Treatment B (see 4.2.2).

3.2.2.1 Cutting leather uppers. The leather shall conform to the thickness specified in TABLE I when tested as specified in 4.4.2. With the exception of the eyelet stays, none of the upper leather parts shall be split or shaved. Skiving of upper leather parts is permitted, provided they meet the requirements listed in 3.4.1.

TABLE I. Thickness of leather uppers.

Part Thickness (ounces) Minimum Maximum

Vamp 4-1/2 6 Quarter 2 3-1/2 Outside counter pocket 4-1/2 6 Eyelet stay 2 3-1/2 Gusset-tongue 2 3-1/2 Collar 2 3-1/2 Backstay 4-1/2 6

3.2.3 Rubber, outsole and heel. The outsole and heel shall be a one-piece oil resisting rubber unit consisting of a non-marking, oil and jet fuel-resistant compound and traction tread design conforming to Style 1452 as shown in FIGURE 1 (see 6.3.1). The outsole shall be a minimum of 15-iron, 5/16 inch thickness of solid rubber at each of the lugs. The outsole shall be permanently attached to the upper through a polyurethane direct-attach method with edge scouring uniform in appearance. The color of the outsole and heel shall be black.

3.2.3.1 Rubber outsole compound requirements. The requirements for the rubber outsole are based on testing done on slabs (according to ASTM procedures) and are not actual soles.

The requirements shall be as specified in TABLE II when tested in accordance with 4.4.2.

TABLE II. Rubber outsole component requirements.

Characteristics Requirement

DIN abrasion resistance (max) 180 Hardness (shore A), (min-max) 60-70 Stitch tear, pounds (min) Dry Fuel B

Tear strength, Die C, pounds (min) 200 Ross flex, IRM Oil 903, percent (max) 50,000 flexes

Volume swell, percent (max) Fuel B (46 hrs.)

Non-marking Pass Tensile, pounds (min) 1,400 Elongation, percent (min) 400 Slip index, wet stainless steel (min) 0.30

3.2.4 Midsole. The polyether polyurethane cushion midsole shall be directly attached to the upper and shall be achieved either through an injection molding or open pouring method. The dimensions of the cushion midsole shall be sufficient to meet all of the salient characteristics listed within this document. The requirements for the polyether polyurethane are based on testing done on test slabs (according to ASTM procedures) and are not actual soles. The requirements shall be specified in TABLE III when tested in accordance with 4.2.2. The midsole shall not have any visible holes/voids on its surface, no imbedded foreign matter, and no visible surface blisters. There shall be no separation between the midsole/outsole or upper/midsole.

TABLE III. Polyether polyurethane physical requirements.

Characteristic Requirement Density, gm/cc (min-max) 0.40-0.60 Hardness, shore A (min-max) 45-75 Tensile strength, kgf/cm2 (min) 21 Elongation, % (min) 250 Tear strength, kg/cm (min) 3.7 Volume swell (%) w/ IRM 903 (@24 hours) at room temperature (max)

Ross flex (1x6 inches) @ minus 5°C, percent (max) 150,000 cycles

3.2.5 Insoles. The insole shall meet the requirements specified in TABLE IV when tested in accordance with 4.2.2.

TABLE IV. Insole requirements.

Thickness, inch (min-max) 0.090-0.166 Fungal resistance (level, min) Level 10 Wet tensile, kgf/cm2 (min) 70 Flexing index, 5000 cycles (min) 3.7 Abrasion resistance: nonwoven board, revs dry (min) revs wet (min)

25,600 6,400

Transverse tensile-dry, kgf/cm2 (min) 8 Dimensional stability, % (max) 0.7 Peel strength, kgf/cm2 (min) 0.5

3.2.6 Last. The boots shall be made on commercial lasts, Jones & Vining part number M7-0103 (men’s) and part number L7-0732 (women’s), or an equal protective toe last, subject to the review and approval of the government. The numerical size of the boots shall correspond with the numerical size of the last used to produce the boots (see 6.3.2).

3.2.7 Shank. The steel or fiberglass shanks shall be bonded to the insole and shall conform to the shape of the last (see 4.3.1.1).

3.2.8 Steel box toe. A commercial, corrosion resistant steel box toe that properly fits the last (size and width) shall be used to produce the safety boots. The steel box shall not be readily detectable by visual observation at a distance of 3 feet (see 3.4.1 and 4.3.1).

3.2.9 Toe cushion. Commercial materials used for the toe cushion shall effectively cushion and mask the breastline of the steel box toe (see 4.3.1.1).

3.2.10 Upper lining. The upper lining shall be constructed from a three-layer laminate material.

The three-layer laminate lining shall consist of a knitted face cloth, an inner foam, and a knitted back cloth and shall conform to the requirements specified in TABLE V (see 4.2.2). The knitted face cloth layer shall consist of a black warp knitted cloth that meets the weight, abrasion, water absorption and bursting strength requirements listed in TABLE V and specified in 4.2.2. The middle inner foam layer shall be an ester foam that meets the weight and thickness requirements listed in TABLE V and specified in 4.2.2. The knitted back cloth layer shall consist of a black warp knitted cloth that meets the weight requirements listed in TABLE V and specified in 4.2.2.

The three layers shall be flame laminated, and shall meet the thickness and weight requirements listed in TABLE V and specified in 4.2.2. When attached to the boot, the upper lining shall be well-constructed, properly mated with the boot upper, pulled smooth and tight without any tears, and not be loose, wrinkled or discolored. The upper lining requirements apply to both Class 1 and Class 2 boots. If used, any antimicrobial technology shall be an Environmental Protection Agency (EPA) registered antimicrobial.

TABLE V. Upper lining performance requirements.

Upper Lining Characteristic Requirement Face cloth layer

Weight (oz/yd2), (min-max) 4.98-5.50 Martindale abrasion, evolutions/cycles (min), fabric only, dry

Pass, no holes150,000

Martindale abrasion, evolutions/cycles (min), fabric only, wet

Pass, no holes 50,000

Water absorption (max) 140% Bursting strength, pounds (min) Fabric only

Middle inner foam

Weight (oz/yd2), (min-max) 2.19-2.42 Thickness (inch) (min-max) 0.057-0.063

Back cloth layer Weight (oz/yd2) (min-max) 0.91-1.01 Three layer laminate material

Weight (oz/yd2), (min-max) 8.0-9.0 Thickness (inch), (min-max) 0.085-0.095

3.2.11 Counter. The counter shall be molded with no rolls or curls, shall be positioned to fit the counter pocket, and shall provide structural support to the heel area of the boot. The thermoplastic performance requirements of the counter are listed in TABLE VI and tested as in TABLE IX (see 4.2.2).

TABLE VI. Thermoplastic performance requirements.

Initial collapsing load (N, min) 130 Resilience (%, min) 25 Moisture resistance (%, min) 80 Area shape retention (%, min) Initial 85 10th Collapse 60

3.2.12 Speed loops/eyelets. The speed lace assembly shall be in accordance with Drawing 2-1- 1635, however, notes in the drawing referencing Type 1 and Type 2 boots do not apply to this item (see 6.5). The appropriate number of eyelets and speed loops shall be securely attached to the eyelet facing (see TABLE VII). The speed loops shall be brass and coated nylon, black gloss finish. The speed loops and eyelets above and below the comfort notch shall be evenly spaced and aligned (see 4.3.1.1).

TABLE VII. Speed loops and eyelets.

Sizes

Below Comfort Notch Above Comfort Notch Number of Speed

Loops Number of Eyelets Number of Speed Loops

Women’s 4 to 7-1/2 2 2 3 Women’s 8 and Up 2 2 4 Men’s 6 and Up 2 2 4

3.2.14 Collar foam. The collar foam used in the top band shall have a length equal to the circumference of the boot top exclusive of the gusset and tongue, and shall provide the necessary padding for comfort. The collar foam shall be closed cell polyurethane foam, 1/4 inch thick.

The collar foam shall not absorb liquids, shall not be susceptible to hydrolysis, shall have a compression set such that comfort is provided for the life of the item, and shall not promote fungal or bacterial growth (see 4.3.1.1).

3.2.15 Thread. The various commercial sewing threads used in the fitting operation and during the construction shall be black for Class 1 and for Class 2. The physical properties of each thread (size, ply, twist, breaking strength, elongation) shall be selected to provide reliable boot performance for the life of the boots (see 4.3.1.1).

3.2.16 Laces. The laces shall conform to Type III, Class 1 of A-A-55093. The color of the laces shall be black. The length of the laces shall be a minimum of 72 inches for men’s sizes 3 through 6-1/2 and women’s sizes 4 through 8-1/2, 87 inches for men’s sizes 7 through 11 and women’s sizes 9 through 12, and 97 inches for men’s sizes 11-1/2 through 16 (see 4.2.2 and 4.3.1.1).

3.2.17 Removable cushion insert. The removable cushion insert shall be a low-density polyurethane heel cup support made of a pure polyether polyurethane system, black in color, per requirements in TABLE VIII. It shall be molded to a fabric top cover, black in color, per TABLE IV Lining cloth performance requirements. Cushion inserts shall be mated, by size, to the correct size boots and shall be uniform. The removable cushion insert requirements are listed in TABLE VIII (see 4.3.1.1).

TABLE VIII. Removable cushion insert requirements.

Density (kg/m3), (min-max) 256-320 Foam hardness (Shore 00), (min-max) 55-65 Tensile strength (kilopascals), (min) 552 Compression set @ 25% @77°F (%), (max) 5

3.2.18 ASTM identification label. The safety boots shall contain an ASTM label to show that it conforms to Class 75 safety footwear requirements for impact resistance and compression resistance. The label shall conform to the requirements specified in ASTM F2413. The label shall be legible and last the life of the boots (see 4.3.1.1).

3.2.19 Label, marking identification. The label on the inside of the tongue or quarter shall be permanently marked with the manufacturer’s name and/or logo, style number, Navy Certification Program certification number, size, width, and NSN. The boot shall contain a manufacturing tracking lot number. At the manufacturer’s discretion, the ASTM identification label (see 3.2.18) may be combined with the boot label. Marking information shall be printed or stamped and shall be legible. The marking shall be sewn or directly attached to the inside of the boot and shall not cause any reduction in footwear functionality or durability. When a label attachment is accomplished by sewing in lieu of direct attachment, it shall be sewn to the boot collar joining seam 1 (± 1/8) inch from the lateral eyelet facing. The sewn label shall not be greater than 1 inch in height and 1-1/2 inches in width (see 4.3.1.1).

3.2.20. Label, barcode. Each pair of boots shall be barcoded with a paper tag in accordance with MIL-DTL-32075, type VIII, class 17 label/tag. The tags shall have a hole and shall be attached to the boot through one of the eyelets by a fastener, clearly legible and readable by scanner. The label/tag shall be located on the end item so that it is completely visible when the boots are packaged as specified. The bar coding element shall be legible and readable by scanner. The bar code element shall be a 13 digit National Stock Number (NSN). There shall be a 12 digit Universal Product Code (UPC) assigned for all NSNs by the government. The initial “UPC” shall appear beneath the code. The bar codes for the NSN and the UPC shall be medium to high density and shall be located so that they are completely visible on the item when it is packaged as specified. The label shall not cause damage to the item such as a spot or stain or damage due to the location on the item.

3.2.21. Pairing. The boots shall be paired and properly mated, left and right, of the same size.

Within each pair, there shall be no variation in color and appearance between the boots and no variation in boot height and/or outsole thickness.

3.3 Design. The general purpose and flight deck safety boot shall be a blucher design vamp and foxing, front lace eyelet/speed loop closure with “V” notch, a soft resilient leather padded collar, full lining, and removable comfort insole and made in accordance with this purchase description and drawing 06-NCTRF-20. The interface between the sole and the upper shall maintain the clean military look featured in FIGURES 2 through 4. Excessive contouring, texture, and bulkiness which departs from FIGURES 2 through 4 shall not be allowed (see 4.3.1.1).

3.4 End item boot requirements.

3.4.1 Steel box toe impact and compression resistance. The finished boot shall meet the requirements of ASTM F2413, Class I 75/C75 for safety footwear (see 4.5.3).

3.4.2 Finishes. Tannery and shoe factory dyes and/or finishes applied to the leather shall be compatible with each other and shall not adversely change the uniformity of color, appearance, durability and shine-ability of the finished boot (see 4.3.1.1).

3.4.3 Bond strength. The bond achieved between the boot upper, cushion midsole, and outsole shall be resistant to any delamination.

3.4.3.1 Outsole to cushion midsole bond strength. The outsole to cushion midsole bond strength shall not be less than 100 pounds. Testing shall be performed on the end item as specified (see 4.5.1).

3.4.3.2 Entire system to upper. The bond strength shall not be less than 130 pounds. Testing shall be performed on the end item as specified (see 4.5.2).

3.4.4 Hardware attachment. The attachment of hardware shall withstand a minimum 66 pound (294 N) pull force to remove the hardware (see 4.5.6).

3.4.5 Flame resistance (whole boot). The finished boot, when exposed to flame, shall not have an after flame of more than 5.0 seconds, shall not melt or drip, and shall not exhibit any burn through. The boot will be considered to have failed the burn through test when burn through is observed through all layers of the quarter panel and lining components. The direct attach cushioned midsole shall not be subject to the no melt/drop requirement. However, the outsole shall not melt or drip when tested in accordance with 4.5.7.1.

3.4.6 Sole conductive heat resistance. The temperature of the insole surface in contact with the foot shall not exceed 44°C (see 4.5.7.2).

3.4.7 Boot height. The height of for the men’s size 10 Regular/Medium (D) width shall be 8 ½ (± 1/4 inch) and the women’s 8 Regular/Medium (D) width shall be 8 (± 1/4 inch). The boot height shall graduate up and down between sizes and widths; the top line of the boot collar shall be parallel with the floor. Half sizes shall not be graded independently of whole sizes. Height shall not vary between boots of a pair by more than 1/4 inch (see 4.3.1.1; 4.5.4).

3.4.8 Boot weight. The weight of the finished boot (size men’s 10 Regular/Medium (D)) shall be less than or equal to 2.5-pounds per boot when tested as specified in 4.5.5.

3.5 Seams and stitching. All seams shall be uniformly stitched and shall be locked such that they cannot be pulled out. Open seams, broken seams, or runoff stitches shall not be present. When multiple stitch seams are utilized, the stitching shall be regularly spaced between stitched and rows of stitches. Tight seams which cause components to pucker, wrinkle, or malformation shall not be present. Loose seams shall not be present. Thread ends shall be trimmed throughout each entire boot. Stitching gauge shall be regular, and need holes or needle chew shall not be permitted. Internal seams shall not be such that they cause irritation, hot spots, blisters, or other damage to the user.

3.6 Workmanship. Each finished pair of boots shall be uniform in appearance, quality and free from irregularities or defects that could affect form, fit or function including performance or durability when tested or visually and/or dimensionally inspected as specified in Section 4. The finished boots shall conform to the quality of product established by this document. The government will not accept poor quality workmanship, manufacturing defects, or low quality end products. End items shall have no tears, holes, evidence of repair or other damage. There shall be no markings remaining on the boot upper. Components shall be placed properly, and all assembly operations shall be executed properly. Boots shall be paired properly.

4. VERIFICATION

4.1 Classification of inspections. The inspection requirements specified herein as classified as follows:

a. First article inspection (see 4.2).

b. Conformance inspection (see 4.3).

4.2 First article inspection. When first article inspection is required (see 3.1, 6.2), it shall be examined for the requirements in paragraph 4.2.1, 4.2.2, 4.2.3, 4.3.1, 4.4. and 4.5.

4.2.1 First article units. The boots selected as sample units from the first article lot shall be thoroughly checked for dimensional and visual conformance to this document. The sample size of the first article lot shall be 3 pairs for each class. The sizes will be specified in the solicitation or contract.

4.2.2 Component and material inspection. Components and materials shall be inspected in accordance with the characteristics of TABLE IX.

TABLE IX. Component and material tests.

Component Characteristic Requirement paragraph

Test method

Upper leather All in Section 3 of MIL-PRF-3122 3.2.2 All in Section 4 of MIL-

PRF-3122

Color (shade) 3.2.2 Visual (see 4.6) Break/pipiness 3.2.2 SATRA TM-361/ Thickness 3.2.2.1 ASTM D1813

Outsole Direct Attachment 3.2.3 Visual Thickness 3.2.3 Visual2/ DIN abrasion resistance 3.2.3 ASTM D5963 Hardness (shore A) 3.2.3 ASTM D2240 Stitch tear strength (Dry, Fuel B) 3.2.3 ASTM D4786 Tear strength, Die C 3.2.3 ASTM D624 Ross flex 3.2.3 ASTM D10523/ Volume swell, fuel B (@46 hours) 3.2.3 ASTM D471 4/ Non-marking 3.2.3 SATRA TM-223 Tensile 3.2.3 ASTM D3574 Elongation 3.2.3 ASTM D3574 Slip index, wet stainless steel 3.2.3 ASTM F29135/

Midsole6/ Density 3.2.4 ASTM D3574, Test A Hardness (shore A) 3.2.4 ASTM D2240 Tensile strength 3.2.4 ASTM D3574, Test E Elongation 3.2.4 ASTM D3574, Test E Tear strength 3.2.4 ASTM D3574, Test F Volume swell w/ IRM 903 (@24 hours)

3.2.4 ASTM D471

Ross flex (1x6 inches)@ Minus 5°C 3.2.4 ASTM D10527/ Insole Thickness 3.2.5 ASTM D1777

Fungal resistance 3.2.5 ASTM D3273 Wet tensile 3.2.5 SATRA TM2 Flexing index 3.2.5 SATRA TM3 Abrasion resistance:

Nonwoven board 3.2.5 SATRA TM31 Transverse tensile-dry 3.2.5 SATRA TM80 Dimensional stability 3.2.5 SATRA TM98 Peel strength 3.2.5 SATRA TM101

Shank Steel or fiberglass 3.2.7 Visual Upper lining – face cloth

Weight 3.2.10 ASTM D3776-C Martindale abrasion, fabric only, dry 3.2.10 ASTM D49668/

Component Characteristic Requirement paragraph

Test method

Martindale abrasion, fabric only, wet 3.2.10 SATRA TM31 Water absorption 3.2.10 SATRA TM6 Bursting strength, fabric only 3.2.10 ASTM D37879/

Upper lining – middle layer

Weight 3.2.10 ASTM D3776-C Thickness 3.2.10 ASTM D1777

Upper lining – back cloth

Weight 3.2.10 ASTM D3776-C

Upper lining – finished package

Weight 3.2.10 ASTM D3776-C Thickness 3.2.10 ASTM D1777 Antimicrobial finish (if used) 3.2.10 Visual10/

Laces All in Section 3 of A-A-55093 3.2.16 A-A-5509311/ Removable cushion inserts

Density 3.2.17 ASTM D357412/ Foam hardness, Shore 00 3.2.17 ASTM D2240 Tensile 3.2.17 ASTM D357413/ Compression set @ 25% @77°F 3.2.17 ASTM D3574 Test D

Counter Initial collapsing load (N) 3.2.11 SATRA TM-83 Resilience 3.2.11 SATRA TM-8314/ Moisture resistance 3.2.11 SATRA TM-8315/ Area shape retention 3.2.11 SATRA TM-83

1/ The break of vamp or quarter leather shall not be greater than No. 5 on SATRA Break Scale Method.

2/Measured using calipers.

3/Test conducted after 46 hours in Fuel B at Room Temperature

4/ Compound testing shall be performed on ASTM test slabs (Requirements for rubber outsoles are based on testing performed on 0.250-inch test slabs in accordance with ASTM procedures).

Volume swell testing shall be performed at room temperature. Ross Flex testing shall be performed using a 2mm insole board attached to the rubber. Ross Flex Oil – one drop of oil per 6,000 flexes.

5/ Test in accordance with ASTM F2913 flat mode. Sole to be pre-conditioned with 40 grit sand paper for six (6) cycles.

6/Testing conducted at room temperature with 10-millimeter (13/32-inch) test slabs 7/ Ross Flex test method modified to include a 2mm insole board glued to the specimen and conducted @ minus 5 degrees C.

8/As described in the test method; Martindale Tester; Pressure applied: 12KPa; visually examine specimens after each 3200 cycles; Abradant changed after each 3200 cycles. Use option 1 for evaluation; no hole appears.

9/ ASTM D6797 allowed as alternate 10/ EPA registration number provided.

11/All in Section 4 of A-A-55093.

12/16-20 lb/ft3

13/>80PSI

14/ Resilience is percent retention of initial collapsing load after ten (10) collapses.

15/Moisture resistance is percent retention of initial dry collapsing load after 1 hour immersion.

4.2.3 In-process inspections. Unless otherwise specified, visual and dimensional examinations shall be made at any point or during any phase of the manufacturing process to determine whether construction details which cannot be examined in the finished product are in accordance with requirements specified in Section 3. Materials and components that can be classified as defects shall be removed from production.

4.2.3.1 In-process examination. The defects found during in-process examination shall be classified in accordance with TABLE X, XI, and XII. The lot size shall be expressed in units of upper assemblies prepared for lasting. The sample unit shall be one completely fabricated upper assembly prepared for lasting.

4.2.3.2 Pre-fitting examination of leather, cut parts. The cut parts shall be examined for the defects listed in TABLE X before fitting. The lot size shall be expressed in units of cut parts.

The sample unit shall be one cut part. Appearance defects shall be scored only when the condition is plainly visible at a distance of 3 feet.

TABLE X. Leather cut parts defects.

Examine Defect Classification Major Minor

Upper leather Color not as specified, not even, shaded, color penetration is not throughout the thickness of the hide

Not correct or full grain 102 Leather deeply snuffed; i.e. fiber structure damaged

Grub or tick damage, deep scratches, brands or bony leather

Fat wrinkles or pronounced veins 105 Stretchy vamp 106 Thickness exceeding the maximum specified (see 3.2.2)

Rough fiber on flesh side 202 Off-stretch cut 203 Slaughter cut or flesh cut 107 Grain surface embossed or printed 108

Quarter side panels Not as specified 109 Gusset-tongue and collar cushion leather

Flanky, loose flesh, boney, or boardy 204

4.2.3.3 In-process examination of uppers after all fitting. The upper assemblies shall be examined for the defects listed in TABLE XI. The lot shall be expressed in units of upper assemblies for lasting. The sample unit shall be one completely fabricated upper assembly prepared for lasting.

TABLE XI. Examination of uppers after all fitting.

Construction and workmanship (general)

Any component missing or not specified type 110 Any component misplaced or not affixed as specified 111 Any cut, tear, hole, repair, or factory damage 112 Back seam malformed 205

Leather Thickness more than ½ ounce less than minimum specified (see 3.2.2)

Thickness less than specified minimum but not exceeding ½ ounces less (see 3.2.2.)

Thickness more than maximum specified (see 3.2.2) 207 Off-stretch cut 208

Upper lining Torn, loose or wrinkled 114 Not properly mated with upper 115 Not pulled smooth and tight 116 Poorly constructed or discolored 117

4.3 Conformance inspection. Conformance testing shall include the examinations of 4.2.2, 4.2.3 and 4.4. Each pair of boots shall be examined for compliance with the requirements specified in

3.2.2 through 3.5. This element of inspection shall encompass all visual examinations and dimensional measurements. Unless otherwise specified, sampling for end item visual inspection (see 4.3.1.1) shall be performed in accordance with ASQ Z1.4 and for the end item inspection testing cited under 4.4, the sampling shall be performed as specified below. The sample unit shall be one pair of boots.

4.3.1 Methods of Inspection.

4.3.1.1 End item boot visual inspection. The finished boots shall be examined for the defects listed in TABLE XII. Defects of pairing shall be classified as a single defect. The inspector shall check to see that cushion inserts are inserted in the boots. For the pairing examination, and when determining possible differences in outsole thickness, the pair shall be examined together.

Appearance defects shall be scored only when the condition is plainly visible at a distance of 3 feet.

TABLE XII. Classification of end item defects.

Pairing

Not properly mated; i.e., not right and left of same size.

Variation in color, luster or appearance. 119 Visible difference of more than 1/4 inch in height between left and right paired boots.

Visible difference in outsole thickness between left and right paired boots

- more than 3/32 inch

- more than 1/16 inch, but not more than 3/32 inch

Cleanness, color and finish Any non-removable spot, stain, or foreign matter.

Color not as specified. 122 Color not uniform. 211 Finish streaky, chipped, or flaky on upper or shows runs on uppers.

Any raw edges not stained to match upper leather.

Design Not as specified. 123 General construction and workmanship

Any cut, tear, hole, repair or damage. 124 Any component or assembly omitted, misplaced; operation omitted, not properly performed.

Safety toe malformed. 126 Seams and stitching 1/ Open seam not repaired. 127

Tight tension resulting in puckering or cutting of the leather.

Loose tension resulting in a loosely secured seam.

Stitching omitted where needed. 130 Gauge of stitching irregular for more than 2 inches.

Gauge of stitching irregular for less than 2 inches.

Thread ends not trimmed throughout the boot.

Outsole Edge scouring is irregular, affecting appearance.

Any observable malformation in thickness or tread.

Examine Defect Classification Major Minor

Eyelets/ speed laces Number of eyelets/speed laces not as specified in each row.

Not same number of eyelets/speed laces in each row.

Eyelet/speed laces not properly spaced within the row or misalignment between the rows to an extent interfering with proper lacing.

Color not as specified 136 Finish not durable. 137 Any eyelet/speed lace omitted, not securely clinched or broken.

Counter Rolled, curled, not filling counter pocket area or not properly positioned.

Steel box toe Readily detectable by visual observation at a distance greater than 3 feet.

Toe cushion omitted. 141 Toe cushion does not mask the breastline of the steel box toe

Shank

Not as specified. 142 Not bonded to the insole 143 Does not conform to the shape of the last.

Thread Color not as specified. 218 Laces Omitted or type not a specified (color, shape, weave etc.).

Length not as specified. 146 Soft tips. 147

Marking identification Omitted, incomplete, incorrect, misplaced, and illegible.

Barcode/ label

Barcode omitted, incorrect, illegible, not attached where specified.

Barcode not visible on packaged item. 220 Barcode attachment causes damage to the item.

Barcode not readable by scanner. 150 Human readable interpretation (HRI) omitted or illegible.

Upper lining (three layer laminate)

Torn, loose or wrinkled. 152 Not properly mated with upper. 221 Color not as specified. 153

Examine Defect Classification Major Minor

Anti-microbial treatment (optional) not registered with EPA

Not as specified 155 Labels ASTM label omitted, incorrect, illegible.

Midsole Visible hole or void on surface of foam. 222 Separation between midsole and outsole.

Imbedded foreign matter. 223 Separation between upper and midsole. 158 Visible surface blister. 224

Removable cushion insert Any cut, tear, curled or rolled material. 225 Improperly sized for boot. 226

Collar foam Omitted or not as specified 159 1/A seam shall be classified as open when one or more stitches joining a seam are broken or when two or more consecutive skipped or runoff stitches occur. On multiple stitched seams, a seam shall be considered open when either one or both sides of the seam are open.

4.4 End item boot testing. Finished boots shall be tested for the characteristics listed in TABLE XIII. The sample size shall be five (5) boots per lot except for impact resistance, compression resistance, hot surface contact, and hardware attachment which shall be three (3) boots. The lot shall not be acceptable if one or more samples fail any test.

TABLE XIII. End item testing.

Characteristic Paragraph Test Method

Bond strength, outsole to cushion midsole 3.4.3.1 4.5.1 Bond strength, entire sole to upper 3.4.3.2 4.5.2 Impact resistance test 3.4.1 4.5.3 Compression resistance test 3.4.1 4.5.3 Height 3.4.7 4.5.4 Weight 3.4.8 4.5.5 Hardware attachment 3.4.4 4.5.6 Flame resistance (whole boot) 3.4.5 4.5.7.1 Sole conductive heat resistance 3.4.6 4.5.7.2

4.5 Methods of test.

4.5.1 Bond strength test of outsole to cushion midsole. (see 3.4.3.1)

4.5.1.1 Specimen. The specimen shall be a finished boot which has aged at least 2 days. The outsole shall be separated from the cushion midsole for a distance of approximately 2-1/2 inches each from the toe end of the specimen.

4.5.1.2 Apparatus and procedure. A power-driven tensile tester or an approved testing device of equal performance, shall be used, the rate of travel of the power-actuated grip shall be 2 inches per minute. The machine shall be operated with a device for maintaining maximum load indication. The separate toe ends of the specimen shall be clamped in the jaws of the machine.

The specimen shall extend outward at right angles to the direction of the application load. The machine shall be started, and the surface being tested shall be pulled apart to a distance of not more than 4-1/2 inches from the toe. Upon attaining that degree of separation, the load indicated on the machine shall be read and recorded. If the required load is achieved (at any time during the pull test) the test is deemed as passing.

4.5.2 Bond strength test of entire soling system to boot upper. (see 3.4.3.2)

4.5.2.1 Specimen. The test specimen shall be legibly marked on each side at two points (2 inches and 4 inches from the tip of the toe). The entire soling system shall then be separated from the upper to the 2 inch mark. The separation may be aided by any suitable device or machine capable of withstanding the amount of force necessary to accomplish separation. The toe cap of the boot shall be removed to facilitate mounting of the specimen in the tester. In event that the point of separation at the 2 inch mark is not between the upper and the soling system, that portion of the soling system remaining adhered to the upper shall be separated manually (with the aid of a knife or other instrument), so as to show separation between leather and soling system. Care should be taken in order to be sure that the leather is not cut.

4.5.2.2 Apparatus and procedure. The apparatus for measuring outsole/upper separation shall be as described in test method ASTM D2208. The separated toe portion of the boot shall be gripped by one clamp in a manner such that the minimum effective jaw surface area applied shall be 1 inch by 1 inch. The jaw surface shall be centered approximately 1/2 inch to 1 inch from the tip of the toe. The other jaw surface shall hold the overlay portion of the separated upper, and it shall not be less than 1 inch by 2 inches, with the long dimensions perpendicular to the pull of the machine. The machine shall be set in operation and the separation continued at a speed of 10 inches per minute until the outsole is separated from the upper to a point past the mark 4 inches from the tip. The maximum value attained during separation shall be taken as the bond strength.

4.5.3 Impact and compression. The finished boots shall be tested as specified in ASTM F2412 for impact and compression resistance (see 3.4.1).

4.5.4 Boot height, measuring method. The height of the boot shall be measured at the back inside of the boot with the comfort insole removed (see 3.4.7) using a calibrated ruler or caliper.

The overall height of the boot shall include the comfort collar. Five pairs of boots shall be measured. For each pair, the left and right boot shall be measured and reported separately.

4.5.5 Boot weight. Boot weight is evaluated with the insole insert and laces in place. Five pairs of boots shall be weighed after conditioning at a temperature of 70°F ± 5°F, and a relative humidity of 65 percent, ± 5 percent, until equilibrium is reached, as determined in accordance with ASTM D 1776 or for at least 24 hours. Specimens shall be tested within 5 minutes after removal from conditioning. The weight of the boots shall be measured on a calibrated scale.

For each pair, the left boot and the right boot shall be weighed separately. The average weight for each pair shall be reported (see 3.4.8).

4.5.6 Hardware attachment. The boot hardware shall be tested as specified in NFPA 1971,

7.10.14 and 8.49 Eyelet and Stud Post Attachment Test (see 3.4.4).

4.5.7 Thermal protection. The boots shall be tested for flame resistance and sole conductive heat resistance as specified in paragraphs 3.4.5 through 3.4.6.

4.5.7.1 Flame resistance (whole boot).

4.5.7.1.1 Specimen. Three complete boots shall be tested after conditioning at a temperature of 70°F ± 5°F, and a relative humidity of 65 percent, ± 5 percent, until equilibrium is reached, as determined in accordance with ASTM D1776 or for at least 24 hours. Specimens shall be tested within 5 minutes after removal from conditioning.

4.5.7.1.2 Apparatus. The test apparatus shall consist of a burner, support stand, utility clamp, stopwatch, butane gas, gas regulator valve system, and measuring scale. The burner shall be a high temperature, liquefied petroleum type Fisher burner. The stopwatch or other device shall measure the burning time to the nearest 0.1 second. The butane shall be of commercial grade, at least 99.0 percent pure. The gas regulator valve system shall consist of a control valve system with a delivery rate designed to furnish gas to the burner under a pressure of 2.5 ± 0.25 psi, at the reducing valve. The flame height shall be adjusted at the reducing valve producing a pressure at the burner of approximately 0.1 psi. A freestanding flame height indicator shall be used to assist in adjusting the burner flame height. The indicator shall mark a flame height of 3 inches above the top of the burner. A specimen support assembly shall be used to support the footwear specimen above the burner flame.

4.5.7.1.3 Procedure. The burner shall be ignited and the test flame shall be adjusted to a height of 3 inches with the gas on/off valve fully open and the air supply completely and permanently off, as it is important that the flame height be closely controlled. The 3 inch height shall be obtained by adjusting the orifice in the bottom of the burner so that the top of the flame is level with the marked flame height indicator. With the specimen mounted in the support assembly, the burner shall be moved so that the flame contacts the specimen at a distance of 1-1/2 inches at 90 degree angles at the heel bottom, top of toe, tongue (with laces in place), back stay, left upper and right upper; and at a 45 degree angle at the toe.

The burner flame shall be applied to the specimen for 12 seconds. After 12 seconds, the burner shall be removed. The after flame time shall be measured as the time, in seconds, to the nearest

0.2 second that the specimen continues to flame after the burner is removed from the flame.

Following the flame exposure, the specimen shall be removed and examined for burn through.

Each layer of the specimen shall be examined for melting and dripping. The after flame time shall be recorded and reported for each specimen. The average after flame time shall be calculated and reported. The after flame time shall be recorded and reported to the nearest 0.1 second. Observations of burn through, melting, or dripping for each specimen shall be recorded and reported.

4.5.7.2 Sole conductive heat resistance. The boots shall be tested as specified in NFPA 1971,

7.10.1 and 8.8 Conductive Heat Resistance Test 2 (see 3.4.6).

4.6 Color and shade verification (Class 2 aviator brown 3763). The Class 2 aviator brown 3763 color shall match the standard shade in 3.2 when viewed using AATC Evaluation Procedure 9, Option C, with sources simulating artificial daylight D75 illuminant with a color temperature of 7500 (± 200)K, illumination of 100 (± 20) foot candles and shall be a good match to the standard sample under incandescent lamplight at 2856 (± 200)K.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of material is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by Inventory Control Point’s packaging activity within the Military Service or Defense Agency, or within the military service’s system commands. Packaging data retrieval is available from the managing Military Department’s or Defense Agency’s automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use. The safety boots are intended to be worn by Naval personnel in any situation when a safety boot is required. The safety boots covered by this purchase description are authorized for flight line personnel or flight crews or in any case where Foreign Object Debris (FOD) is a consideration.

6.2 Acquisition requirements. Acquisition documents should specify the following:

a. Title, number, and date of the purchase description, including any amendments.

b. Class, size, quantity (see 1.2).

c. National Stock Number.

d. Applicable Government drawings, including revisions.

e. When first article is required (see 3.1).

f. Number of first article inspection samples (see 4.2.1).

g. Name and address of the first inspection facility; and the name and address of the Government activity responsible for conducting the first article inspection program.

h. Packaging required (see 5.1).

i. Specific issue of individual documents referenced (see 2.2).

j. Inspection conditions.

k. Conformance inspection and acceptable quality limits.

6.3 Sources of Supply.

6.3.1 Outsoles. Outsoles conforming to the requirements of this document (Style 1452 Outsole Pattern) may be obtained from: Quabaug Corporation, 18 School Street, North Brookfield, MA 01535, https://www.vibram.us (see 3.2.3).

6.3.2 Lasts. Lasts conforming to the requirements of this document may be obtained from:

JONES & VINING MA - Model Room, 124 Turnpike Street, Unit 4, West Bridgewater, MA 02379, https://www.jonesandvining.com (see 3.2.6).

6.3.3. Suggested Sources of Supply. The Navy has found that the following style numbers meet the requirements of this document.

6.3.3.1. Boot lining. Style Number 547-FA65BK, TemperDri/Foam/Tricot, Emtex Global, 42B Cherry Hill Drive, Danvers, MA 01923, https://emtexglobal.com (see 3.2.10).

6.4. Information requests. For access to information such as patterns, drawings, standard shade samples of cloth etc. go to Defense Supply Center Philadelphia's website for their Specification/Pattern/Drawing Request form, https://www.dla.mil/TroopSupport/ClothingandTextiles/SpecRequest.aspx. Complete the request form and then submit. Requests to use equivalent materials and/or components or to make changes to the pattern should be sent to the contracting officer for approval by the military service.

6.5 Speed lace assembly. In the speed lace assembly drawing 2-1-1635, references to black for type I and tan 20138 of FED-STD-595 for the type II boot do not apply to this item (see 3.2.12).

CONCLUDING MATERIAL:

Custodians Preparing Activity:

Navy-NU Navy - NU

DLA-CT

Review Activity:

Navy-AS https://emtexglobal.com/

FIGURE 1. STYLE 1452 OUTSOLE PATTERN (PROFILE/TREAD PATTERN).

FIGURE 2. MEDIAL (INSIDE) VIEW.

FIGURE 3. LATERAL (OUTSIDE) VIEW.

FIGURE 4. HEEL VIEW.