MIL-DTL-32260 Rev. A.PDF

INCH-POUND

MIL-DTL-32260A (AR)

17 April 2014

SUPERSEDING

MIL-DTL-32260 (AR)

23 October 2007

(See 6.8)

DETAIL SPECIFICATION

Primer, Percussion - M28A2, M28B2, XM133 and XM134 Assembly

This specification is approved for use by the U.S. Army Armament Research Development and

Engineering Center (ARDEC), and is available for use by all Departments and Agencies of the

Department of Defense.

1. SCOPE

1.1 Scope. This specification covers metal parts, loading, assembling and packing of the

M28A2, M28B2, XM133, and XM134 percussion primers.

AMSC N/A FSC 1390

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

Comments, suggestions, or questions on this document should be addressed to the Commander, U.S. Army ARDEC, ATTN: RDAR-EIQ-SE, Picatinny Arsenal, NJ 07806-5000 or emailed to usarmy.picatinny.ardec.list.ardec-stdzn-branch@mail.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST

Online database at https://assist.dla.mil.

Reactivated after 17 April 2014 and may be used for new and existing designs and acquisitions

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2. APPLICABLE DOCUMENTS.

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

2.2 Government documents.

2.2.1 Specifications, standards and handbooks. The following specifications, standards, and handbooks below form a part of this document to the extent specified herein.

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-P-223 - Powder, Black

MIL-P-20449 - Primer, Percussion, M61 Loading, Assembling and Packing

DEPARTMENT OF DEFENSE STANDARDS

MIL-STD-286 - Propellants, Solid: Sampling Examination and Testing

MIL-STD-1168 - Ammunition Lot Numbering and Ammunition Data Cards

MIL-STD-1916 - DOD Preferred Method of Acceptance of Product

(Copies of these documents are available online at http://quicksearch.dla.milhor from the

Standardization Documents Order desk, 700 Robbins Avenue, Bldg 4D. Philadelphia, PA 19111-

5094.)

2.2.2 Other Government documents, drawings and publications. The following other

Government documents, drawings and publications below form part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation

(see 6.2)

US ARMY ARMAMENT RESEARCH, DEVELOPMENT

AND ENGINEERING CENTER (ARDEC) DRAWINGS

8802117 - Testing Fixture, Primer

Sensitivity Assembly

8838012 - Cup, Battery

8838015 - Plug, Firing

8838080 - Head

8838081 - Head

8838089 - Body

8838129 - Primer, Percussion M28A2 Assembly

8838130 - Primer, Percussion M28B2 Assembly

13026755 - Primer, Percussion XM133, XM134 Assembly

Source: https://assist.dla.mil -- Downloaded: 2017-03-15T13:09Z Check the source to verify that this is the current version before use.

http://quicksearch.dla.mil/

(Copies of these drawings maybe requested online at usarmy.picatinny.ardec.list.drawing-request-help-desk@mail.mil or from US Army ARDEC, ATTN: RDAR-EIS-PE, Picatinny

Arsenal, NJ 07806-5000.)

2.3 Order of precedence. Unless otherwise noted herein or in the contract, 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 Requirement inspections.

3.1.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2.

3.1.2 Conformance. A sample shall be subject to conformance inspection in accordance with 4.3.

3.2 Materials, components and assemblies. The materials, components and assemblies shall be in accordance with all requirements specified on drawings 8838129, 8838130 or

13026755, as applicable.

3.3 Ammunition lot numbering. Ammunition lot numbers shall be assigned in accordance with MIL-STD-1168.

3.4 Moisture content.

3.4.1 Black powder. The moisture content of black powder at the time of loading shall not exceed 0.5 percent.

3.4.2 Benite Strands. The moisture content of the benite strands at the time of loading shall not exceed 1.0 percent (for XM133/XM134 only).

3.5 Head Assembly. No head assembly shall function after an applying impact energy less than or equal to 47.52 inch-ounces. All head assemblies shall function after applying energy greater than or equal to 159.20 inch-ounces.

3.5.1 Non-functioning test. During testing the head assembly shall not function by an applied impact energy of 47.52 inch-ounces minimum.

3.5.2 Functioning test. During testing the head assembly shall function by applied impact energy of 159.20 inch-ounces maximum.

3.6 Primer assembly ballistic test.

3.6.1 Functioning. The primer assembly shall function without hang fire in excess of one second.

mailto:usarmy.picatinny.ardec.list.drawing-request-help-desk@mail.mil mailto:usarmy.picatinny.ardec.list.drawing-request-help-desk@mail.mil

3.6.2 Chamber pressure resistance. The primer assembly shall withstand a pressure of

53,000 to 55,000 pounds per square inch (psi) without evidence of rupture, or any part of the primer becoming detached.

3.7 Check test for deterioration of Primer, Percussion (M61 Assembly). The M61 primer lot shall be subjected to and shall satisfactorily pass the check test for deterioration specified in

MIL-P-20449 if the total elapsed time between original acceptance of the M61 primer lot and the assembly of that lot into the M28 series or XM133/XM134 series primer exceeds three years, or if the M61 primers have been subjected to adverse conditions for any period of time since the previous test.

3.8 Primer body defects. There shall be no cracks or splits detectable visually in the primer body.

3.9 Primer tubing hydrostatic test. The primer tubing, prior to machining, shall withstand the application of a minimum hydrostatic pressure of P=2*S*t/D, without rupture or indication of flaws, as evidenced by leaks, and without permanent deformation beyond drawing requirements. P = test pressure in Pounds per Square Inch (PSI), S = 14,000 PSI for Steel, S =

7,000 PSI for Brass, t = specified minimum wall thickness in inches, D = specified maximum outside diameter in inches. The test pressure shall be held for not less than five seconds.

3.10 Workmanship. Components shall be free of burrs, sharp edges, cracks, dirt, grease, corrosion, and other foreign matter. Cleaning methods used shall not be injurious to any parts, nor shall the cleaning agents contaminate the parts. All required marking and stamping shall be neat and sharply defined.

4. VERIFICATION

TABLE I. Requirement / verification cross-reference matrix.

Methods of Verification Classes of Verification

1 – Analysis

2 – Demonstration

3 – Examination

4 - Test

A- First Article

B- Conformance

Section 3

Requirements

Description Verification

Method

Verification

Class

Section 4

Verification

1 2 3 4 A B

3.1.1 First Article X X X 4.2

3.1.2 Conformance X X X 4.3

3.2 Materials, Components and

assemblies

X X X X 4.3.2.1-4.3.2.8

3.3 Ammunition lot numbering X X X 4.3.1

3.4 Moisture content X X X 4.4.4

3.5.1 Head Assembly Non-

functioning

X X X 4.4.1

3.5.2 Head Assembly Functioning X X X 4.4.2

3.6 Primer assembly ballistic

test

X X X 4.4.3

3.7 Check test for deterioration

of M61 primer assembly

X

X

4.4.5

3.8 Primer body defects X X X 4.3.2.4

3.9 Primer tubing hydrostatic

test

X X X 4.3.2.4

3.10 Workmanship X X X 4.3.2.1-4.3.2.8

4.1 Classification of inspection. The following types of inspection shall be conducted on this item:

a. First article inspection (see 4.2).

b. Conformance inspection (see 4.3).

4.2 First article inspection. When specified, a sample shall be subjected to first article verification in accordance with Table II.

4.2.1 First article quantity. First article verification shall be performed on the quantity of items as indicated in table II.

4.2.2 First article inspections to be performed. The first article verification shall be performed in accordance with Table II.

4.2.3 First article rejection. If any assembly, component or test specimen fails to comply with any of the applicable requirements, the first article sample shall be rejected.

TABLE II. First article inspection.

Number of FAT

Samples

Requirement

Paragraph

Inspection Method

Reference

Cup, Battery, Dwg. 8838012

Examination for Defects 25 3.2 4.3.2.1

Plug, Firing, Dwg. 8838015

Examination for Defects 25 3.2 4.3.2.2

Head, Dwg. 8838080 or 8838081, as applicable

Examination for Defects 25 3.2 4.3.2.3

Body, Dwg. 8838089

Examination for Defects 25 3.2 4.3.2.4

Primer, Percussion M28A2, M28B2 or XM133/XM134 Assembly, see note 1

Examination for Defects, see note 2 25 3.2 4.3.2.5–4.3.2.8

Proving Ground Tests 25 3.6 4.4.3

Non-Functioning 150 3.5 4.4.1

Functioning 250 3.5 4.4.2

Note 1. Drawings: 8838129, 8838130 or 13026755, as applicable.

Note 2. The examination for defects in paragraph 4.3.2 are for dimensional and visual inspections and in many cases must be verified during assembly.

4.3 Conformance inspection.

4.3.1 Lot formation. Lot formation shall be in accordance with lot formation requirement of MIL-STD-1916 paragraph 4.2, Acceptance by Tables. In addition, each lot of primers shall contain:

a. Black Powder or benite strands, as applicable, from not more than two lot interfix numbers from one manufacturer. A lot of black powder or benite strands shall be used to completion.

b. Bodies and components of one lot interfix number from one manufacturer.

c. Primer, Percussion M61 (herein after referred to as primer elements) of one lot interfix number from one manufacturer.

4.3.2 Classification of characteristics

a. Sampling requirements. Inspection sampling requirements for critical, major and minor characteristics are defined in MIL-STD-1916. Unless specified otherwise, Verification Level VII in addition to 100% inspection shall be used for all characteristics defined as Critical, Verification Level IV shall be used for all characteristics defined as Majors and Inspection Level

II for all Minor characteristics.

b. Conformance inspection. Conformance inspection shall be performed in accordance with paragraph 4.3.2.1 through 4.3.2.8. For all conformance inspections the same sample specimen may be used for all non-destructive examinations or tests.

c. Alternative inspections. Alternative conformance inspections may be submitted and approved in accordance with MIL-STD-1916.

4.3.2.1

Cup, battery.

Drawing Number

8838012

Next Higher Assembly

See note 1

Classification

Examination Or Test

Conformance

Criteria

Requirement

Paragraph

Inspection Method

Critical None defined

Major

101 Outside diameter Level IV 3.2 AIE

102 Thickness through bottom Level IV 3.2 AIE

103 Length Level IV 3.2 AIE

104 Diameter of hole Level IV 3.2 AIE

105 Inside diameter Level IV 3.2 AIE

Minor

201 Flat missing from surface at open end Level II 3.2 Visual

202 Evidence of poor workmanship Level II 3.10 Visual

4.3.2.2

Plug, firing.

8838015

101 Large diameter Level IV 3.2 AIE

102 Total length Level IV 3.2 AIE

103 Length of point Level IV 3.2 AIE

104 Profile of point Level IV 3.2 AIE

105 Length of pilot Level IV 3.2 AIE

106 Diameter of pilot Level IV 3.2 AIE

201 Evidence of poor workmanship Level II 3.10 Visual

4.3.2.3

Head.

8838080,8838081

101 Pitch diameter of thread Level IV 3.2 AIE

102 Major diameter of thread Level IV 3.2 AIE

103 Diameter of body pilot Level IV 3.2 AIE

104 Diameter of battery cup cavity Level IV 3.2 AIE

105 Diameter of percussion element cavity Level IV 3.2 AIE

106 Diameter of under flange Level IV 3.2 AIE

107 Diameter of flange Level IV 3.2 AIE

108 Thickness of flange Level IV 3.2 AIE

109 Depth of percussion element cavity Level IV 3.2 AIE

110 Depth of battery cup cavity Level IV 3.2 AIE

111 Runout of flash hole with percussion Level IV 3.2 AIE element cavity

112 Runout of percussion element Level IV 3.2 AIE cavity with diameter under flange

113 Runout of flange with diameter Level IV 3.2 AIE under flange

4.3.2.3

Head.

8838080,8838081

Continued Next Higher Assembly

114 Diameter of chamfer at mouth of Level IV 3.2 AIE percussion element cavity

115 Diameter of flash hole Level IV 3.2 AIE

116 Length to shoulder above thread Level IV 3.2 AIE

117 Length to thread undercut Level IV 3.2 AIE

118 Length of thread including thread Level IV 3.2 AIE undercut Level IV 3.2 AIE

119 Total length Level IV 3.2 AIE

120 Depth of flash cavity Level IV 3.2 AIE

121 Profile of flash cavity Level IV 3.2 AIE

122 Head cracked or split Level IV 3.8 Visual

123 Flash hole missing Level IV 3.2 Visual

4.3.2.4

Body.

8838089

Critical

1 Flash hole missing (see 6.6.1) 100%+Level VII 3.2 AAIE

2 Tube Cracked or split (see 6.6.2) 100%+Level VII 3.8 Visual

3 Hydrostatic test (see 6.6.3) 100% 3.9 AIE

101 Pitch diameter of thread Level IV 3.2 AIE

102 Minor diameter of thread Level IV 3.2 AIE

103 Length of thread Level IV 3.2 AIE

104 Wall thickness Level IV 3.2 AIE

105 Profile of holes Level IV 3.2 AIE

106 Inside diameter Level IV 3.2 AIE

107 Depth of counterbore Level IV 3.2 AIE

108 Diameter of counterbore Level IV 3.2 AIE

109 Total length Level IV 3.2 AIE

110 Runout of inside diameter to Level IV 3.2 AIE pitch diameter of thread

4.3.2.4

Body.

See note 1

Continued Next Higher Assembly

201 Protective coating damaged Level II 3.2 Visual

202 Outside diameter, max Level II 3.2 Visual

203 Evidence of poor workmanship Level II 3.10 Visual

4.3.2.5

Primer, percussion assembly

(Head, prior to assembling battery cup and firing plug).

Drawing Number

See note 1

101 Percussion element missing, cocked or inverted Level IV 3.2 AIE

102 Check test of M61 primer Level IV 3.7 4.4.5

201 Seal between percussion element and head missing or incomplete

Level II 3.2 Visual

202 Evidence of poor workmanship Level II 3.10 Visual

4.3.2.6

(Head, prior to assembling to body).

Drawing Number

See note 1

1 Firing plug or battery cup above flush with surface of head (see 6.6.4)

100%+Level VII 3.2 AIE

2 Head assembly non functioning (see 6.6.5) 4.4.1 3.5.1 4.4.1

101 Firing plug missing or inverted Level IV 3.2 Visual

102 Flash hole in head completely Level IV 3.2 Visual obstructed

103 Battery cup loose or missing Level IV 3.2 Visual and Manual

104 Head assembly functioning 4.4.2 3.5.2 4.4.2

105 Pressure tape not properly applied (only applies to

XM133/XM134)

Level IV 3.2 Visual and Manual

106 Incorrect mass of black powder in flash cavity (only applies to XM133/XM134)

Level IV 3.2 AIE

4.3.2.7

(Body, prior to assembling head assembly).

Drawing Number

See note 1

101 Weight of charge or number of benite strands, as applicable

Level IV 3.2 AIE

102 Liner fails to cover all holes Level IV 3.2 Visual

103 Foreign matter in charge Level IV 3.2 Visual

104 Moisture content of black powder or benite strands, as applicable

4.4.4.1 3.4 4.4.4

4.3.2.8

Primer, percussion assembly, M28A2, M28B2, XM133, XM134.

1 Primer assembly ballistic test (see 6.6.6) 4.4.3 3.6 4.4.3

101 Flash holes not completely sealed Level IV 3.2 Visual/Note 2

102 Total length maximum Level IV 3.2 AIE

103 Diameter at flange maximum Level IV 3.2 AIE

104 Diameter at front end maximum Level IV 3.2 AIE

105 Head assembly loose on body Level IV 3.2 Manual

201 Marking missing, misleading, or Level II 3.2 Visual unidentifiable

202 Crimp of body to head is missing or Level II 3.2 Visual incomplete

203 Evidence of poor workmanship Level II 3.10 Visual

Note 2. Sketches 1, 2 and 3 on Figure 1 indicate acceptable primers. Furthermore, a primer with holes displaying the conditions shown in sketches 4, 5 or 6 may be classed acceptable if the exposed portion of the liner is thoroughly impregnated lacquer and not more than 20 percent of the holes on an individual primer have this condition.

FIGURE 1. Artillery primer standard for lacquer conditions in flash holes.

4.4 Methods of inspection.

4.4.1 Head assembly non-functioning. This test shall be conducted in a test fixture per drawing 8802117. The loaded head, prior to assembling to the body, shall be assembled into the test fixture. A steel ball weighing a min. of 7.92 ounces shall be dropped from a height to give the required impact energy (approximately 6 inches). When testing the XM133/XM134 this test shall be conducted prior to assembling the black powder flash charge.

4.4.1.1 Non-functioning (full sample size). Beginning with the first lot produced, and continuing until three consecutive lots have complied with the acceptance criteria specified, a sample of 150 head assemblies shall be randomly selected from each lot for the test. If any sample fails to comply with the requirement, the lot shall be rejected. Primers subjected to this test shall be destroyed.

4.4.2 Head assembly functioning. The test shall be performed as specified in 4.4.1 except that the weight of the ball shall be 7.96 ounces maximum, and the height shall be adjusted to give the required impact energy (approximately 20 inches). When testing the

XM133/XM134 this test shall be conducted prior to assembling the black powder flash charge.

4.4.2.1 Functioning (full sample size). Beginning with the first lot produced and continuing until three consecutive lots have complied with the applicable requirements specified, two hundred and fifty samples shall be randomly selected from each lot for this test.

If three or more primers fail to comply with the applicable requirements, the lot shall be rejected. If one or two defects are found, a second sample of five hundred primers shall be tested. If the combined number of defective in both the first and second sample is three or more, the lot shall be rejected.

4.4.2.2 Functioning (reduced sample size). After three consecutive lots have met the criteria of 4.4.2.1, a sample of 125 primers shall be randomly selected from each lot for this test.

If two or more primers fail to comply with the applicable requirements, the lot shall be rejected.

If only one defect is found, a second sample of 250 primers shall be tested. If the combined number of defectives in both the first and second sample is two or more, the lot shall be rejected. If a lot is rejected the inspection criteria reverts to that of paragraph 4.4.2.1.

4.4.3 Primer assembly ballistic test. The sample primers shall be sent to a proving ground for testing. The primers shall be assembled to the appropriate cartridge case with M1 projectiles and fired from an M20 cannon using a propelling charge adequate to obtain the required pressure. The rounds shall be fired in an acceptable gun, based upon current gun tube condemnation criteria. The test rounds (charges, primer, and cartridge case) shall be uniformly temperature conditioned at the desired temperature for a minimum of 24 hours prior to testing.

The M1 projectile metal parts assembly shall be inert loaded and dummy fuzed to an as fired weight of 33.0 0.2 pounds.

4.4.3.1 Primer assembly functioning and pressure resistance. A sample of 25 primers shall be randomly selected from each lot for this test. If any primer fails to comply with the requirements of 3.6, the lot shall be rejected.

4.4.4 Determination of moisture content of black powder or benite strands. The moisture content of black powder shall be determined in accordance with the procedure specified in

Specification MIL-P-223. The moisture content of benite strands shall be determined in accordance with test method 102.1.3 of MIL-STD-286.

4.4.4.1 Moisture content sampling. A sample of one primer body, prior to assembly to the head, shall be randomly selected from each shifts production. Failure to comply with the applicable requirement shall be cause for rejection of the quantity of production represented by the sample.

4.4.5 Check test for deterioration of primer, percussion (M61 assembly). The check test of the M61 primer lots shall be performed as specified in MIL-P-20449 immediately before the

M61 primer lot is assembled into the M28 series or XM133/XM134 series primer.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the contract or order shall specify packaging requirements (see 6.2 and 6.3). When DOD personnel perform material packaging, those personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. The Inventory Control Point packaging activity within the Military Department of

Defense Agency, or within the Military Department's System Command, maintains packaging requirements. 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 components and assemblies covered by this specification are intended for use on all M28 series or XM133/XM134 series percussion primers.

6.2 Acquisition requirements. Acquisition documents must specify the following:

a. Title, number and date of this specification.

b. Packaging requirements (see 5 and 6.3).

c. Requirements for submission of first article sample.

d. Requirement for submission of acceptance inspection equipment

e. Certificate of Conformance for each lot or shipment of product

e. Applicable stock number.

f. Sampling requirements for check test for deterioration of primer, percussion M61 assembly (see 6.5).

6.3 Packaging drawings. Drawings listed in this section are for reference only. The government's current packaging for the M28 series and XM133/XM134 Percussion Primers as defined by Technical Data Package (TDP) 8858935 and 8858940, is included for reference. The contractor may use the information contained in the TDP as guidance for its own design. If the contractor chooses to build to the current approved TDP (8858935 and 8858940) the

Government will waive the testing required to meet the First Article performance test requirements of the packaging specification, except for Performance Oriented Packaging (POP) testing which is still required to transport hazardous materials in accordance with Code of

Federal Regulations (CFR), Title 49. Unless otherwise noted, the custodian of the following drawings is the U.S. Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ 07806-5000;

a. 8858935 Box, Packing, Ammunition, for

Primers M28A2, M28B2 or M60A1

b. 8858940 Box, Set-up, Packing, Ammunition for primers

6.4 Visual standards. Visual standards for evaluation of defects will be established for each contract after the first month’s production. However, establishment of visual standards will not waive the requirements for compliance with the requirements of the applicable drawing.

6.5 Check test for possible deterioration of M28 series or XM133/XM134 series artillery primers. The following tests are designed to prevent the loading of deteriorated artillery primers into a major ammunition item. The test should be performed on artillery primers from each lot which has been stored under normal conditions for more than three years or under adverse conditions for any period of time. If the specification for the ammunition item into which the artillery primers are loaded does not require that a check test be performed, the contracting officer should insert a provision for the performance of the check tests in the contract.

6.5.1 Head assembly.

6.5.1.1 Head assembly non-functioning. The flash tube and the head assembly should be separated in a manner that will not damage the head assembly to the extent that the validity of the test results would be questionable. When testing the XM133/XM134 primer, the black powder in the flash cavity should be removed prior to conducting this test. The separated primer heads should be assembled into the test fixture (dwg. 8802117). A steel ball not weighing less than 7.92 ounces should be dropped from a height to give the required impact force

(approximately 6 inches). All head assemblies so tested should be scrapped.

6.5.1.2 Head assembly functioning. This test should be performed as specified in 6.5.1.1 except that the weight of the ball should not be greater than 7.96 ounces, and the height should be adjusted to give the required impact force (approximately 20 inches).

6.5.1.3 Sample size. The Sampling plan for the functioning test should be in accordance with Table III. The non-functioning test should be conducted with 150 primers; with acceptance occurring only with zero failures. Any lot of primer heads which fail to meet the requirement should not be considered for use.

TABLE III. Functioning Test Samples

Sample Sample size Combined

Sample Size

Acceptance

Number

Rejection

Number

First 20 20 * 2

Second 20 40 * 2

Third 20 60 0 2

Fourth 20 80 1 3

Fifth 20 100 1 3

Sixth 20 120 1 3

Seventh 20 140 2 3

* No acceptance on this sample

6.5.2 Moisture content of black powder. A sample of 25 primers should be selected for this test. The black powder should be removed from the flash tube by any suitable means. The moisture content of the powder should be determined in accordance with the method specified in

Specification MIL-P-223. If the moisture content of any of the powder tested exceeds 0.7 percent, the lot of primers should be rejected. Since black powder is hygroscopic, it is advisable to place the powder in a dry, airtight container immediately upon removal, and to run the determination as soon as possible thereafter.

6.5.3 Moisture content of benite strands. A sample of 25 primers should be selected for this test. The black powder should be removed from the body by any suitable means. The moisture content of the benite should be determined in accordance with the method specified in

MIL-STD-286. If the moisture content of any of the benite tested exceeds 1.0% percent, the lot of primers should be rejected.

6.5.4 Cost of check test. The contracting officer will arrange for the contractor to be reimbursed for the expense incurred in the performance of the check test. The test should be conducted at Government expense without cost to the contractor who loaded the M61 primer or the contractor loading and assembling the M28 series or XM133/XM134 series primer. The check test should not constitute a basis for rejection against either contractor, except where deterioration has occurred as a direct result of carelessness in handling, storage, etc., while the primers were under the jurisdiction of either contractor.

6.6 Critical classification notes.

6.6.1 Flash holes missing. Flash holes missing from a primer may cause improper functioning of the primer. The primer may become detached from the cartridge case or detonate, leaving material debris in the gun tube. This is likely to cause injury or death to troops firing the howitzer.

6.6.2 Tube cracked or split. A cracked or split tube may cause improper functioning of the primer. The primer may become detached from the cartridge case, leaving material debris in the gun tube. This is likely to cause injury or death to troops firing the howitzer.

6.6.3 Hydrostatic test. A primer that does not pass the hydrostatic test may rupture or split upon firing resulting in the primer becoming detached from the cartridge case, leaving material debris in the gun tube. This is likely to cause injury or death to troops firing the howitzer or cause a short round, which may result in danger to ground troops.

6.6.4 Firing plug or battery cup above flush. A firing plug or battery cup above flush may result in unintended initiation of the cartridge resulting in injury or death to troops firing the howitzer, or to personnel handling the cartridge case or cartridge.

6.6.5 Head assembly non-functioning. A primer lot non-functioning failure may result in over-sensitive primers, which may result in unintended initiation of the cartridge resulting in injury or death to troops firing the howitzer.

6.6.6 Primer assembly ballistic test.

a. A ruptured of detached primer may result in material debris in the gun tube. This is likely to cause injury or death to troops firing the howitzer.

b. A hang fire will result in a late recoiling breech which may strike Soldiers operating the howitzer resulting in death or serious injury. The requirement of one second for hang fire was base on judgment, as there was not sufficient data available to determine a requirement through engineering analysis.

6.7 Definitions.

Acceptance Inspection Equipment (AIE). Any measuring device that is traceable to the national or international standard used to assure conformance of material to the contract requirements.

Automated Acceptance Inspection Equipment (AAIE). Equipment for which no, or minimal, human involvement is required in the acceptance determination. This includes equipment employing probes/sensors/transducers that are automatically manipulated to perform measuring and detection functions.

6.8 Supersession data. MIL-DTL-32260A supersedes the following specifications:

DTL8838130 and MIL-DTL-32260.

6.9 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.

6.10 Subject term (key word) listing.

Artillery

Cartridge

Check Test

Custodian Preparing activity

Army-AR Army-AR

(Project 1390-2014-002)

NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https://assist.dla.mil.

https://assist.dla.mil/