Standard Torque Requirements.docx

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Miscellaneous Electrical Repair and Inspection on board the NOAA Ship Nancy Foster
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EA133M-RQ-12-0078
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Standard Torque Requirements

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AMC 000-3C General Requirements for Small Contract Ship Repairs.pdf PDF
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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 3/4
59.2 96.0
96.0 160.0
133.6 224.0
144.0 236.8
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.

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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