6001-Table-1-US Standard Bus Connection Bolt Torque Values.pdf
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- Attached to
- FY24 DRYDOCKING AND REPAIRS TO NOAA SHIP PISCES
- Solicitation number
- 1305M223QNMAN0181
About this file
This document provides standard torque values for bus connection bolts. It lists recommended torque specifications in foot-pounds for various grades of heat treated steel, silicon bronze, stainless steel, and aluminum alloy fasteners based on bolt diameter. The related federal contract opportunity is solicitation number 1305M223QNMAN0181 for drydocking and repair services for NOAA Ship Pisces from the Department of Commerce National Oceanic and Atmospheric Administration. The solicitation seeks vendor responses for maintenance, repairs, and inspections to be performed while the vessel is in drydock, with an anticipated award date in FY2024.
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Text version
PEARL Reconditioning Standards Revision
Reference Number Date
U. S. STANDARD
BUS CONNECTION
BOLT TORQUE VALUES 6001 5 11-2008
6001 - 1 PEARL
TABLE 1
U. S. Standard Bus Connection
Bolt Torque Values
Heat Treated Steel – Cadmium or Zinc Plated
GRADE SAE 1 & 2 SAE 5 SAE 7 SAE 8
MINIMUM
TENSILE
(P.S.I.)
64K
105K
133K
150K
BOLT
DIAMETER
(IN INCHES)
TORQUE (FOOT POUNDS)
1/4 4.0 5.6 8.0 8.4 5/16 7.2 11.2 15.2 17.6 3/8 12.0 20.0 27.2 29.6 7/16 19.2 32.0 44.0 48.0 1/2 29.6 48.0 68.0 73.6 9/16 42.4 70.4 96.0 105.6 5/8 59.2 96.0 133.6 144.0 3/4 96.0 160.0 224.0 236.8 7/8 152.0 241.6 352.0 378.4
1.0 225.6 372.8 528.0 571.2
Silicon Bronze Fasteners* Torque (Foot-Pounds)
Bolt Diameter in Inches Non-Lubricated Lubricated 5/16 15 10 3/8 20 14 1/2 40 25 5/8 55 40 3/4 70 60
* Bronze alloy bolts shall have a minimum tensile strength of 70,000 pounds per square inch.
PEARL Reconditioning Standards Revision
Reference Number Date
U. S. STANDARD
BUS CONNECTION
BOLT TORQUE VALUES 6001 5 11-2008
PEARL 6001 - 2
Stainless Steel Fasteners**
Torque (Foot Pounds) Bolt Diameter in Inches Uncoated
5/16 14 3/8 25 1/2 45 5/8 60 _ 90
** Bolts, cap screws, nuts, flat washers, locknuts: 18-8 alloy.
** Belleville Washers: 302 alloy.
Aluminum Alloy Fasteners*** Torque (Foot Pounds)
Bolt Diameter in Inches Lubricated 5/16 8.0 3/8 11.2 1/2 20.0 5/8 32.0 3/4 48.0
*** Aluminum alloy bolts shall have a minimum tensile strength of 55,000 pounds per square inch.
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