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Torque in the Bolts

Given the geometry and material properties of the bolt, this calculator computes the approximate required torque.

Input

Material Preperties of Bolts
Grade:
ASTM
A307
A325 Type 1
A325 Type 2
A325 Type 3
A354 BB
A354 BC
A354 BD
A449
A490 Type 1
A490 Type 3
SAE
1
2
3
4
5
5.2
6
7
8
8.2
Other
Socket Head Cap Screws
Geometry of Bolts
Size:
Major Diameter
(inch)
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
¾
13/16
7/8
15/16
1
11/16
11/8
13/16

15/16
1-3/8
17/16

19/16
15/8
111/16

2



3
Thread:
Coarse
Fine
Extra Fine
Glossary