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Reference Tables -- Whitworth Steel Bolt Torques

 

Bolt Torque Information
Whitworth Steel Bolt Torques





Whitworth Steel Bolts
Torque Specifications

Bolt Size
Inches
Coarse Threads
Per Inch
Standard Dry Torque in Foot-Pounds
Grades A & B
62,720 psi
Med Carbon Steel
Grade S
112,000 psi
Med Carbon Steel
Grade T
123,200 psi
Med Carbon Steel
Grade V
145,600 psi
Med Carbon Steel
1/4
20
5
7
9
10
5/16
18
9
15
18
21
3/8
16
15
27
31
36
7/16
14
24
43
51
58
1/2
12
36
64
79
89
9/16
12
52
94
111
128
5/8
11
73
128
155
175
3/4
11
118
213
259
287
7/8
9
186
322
407
459
1
8
276
497
611
693

 

 

 

 

 

 


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