Inch Bolt Torque Table
Estimated with clamp load as 75% of proof load
as specified in SAE J429 and ASME 574 |
| Steel Grade |
SAE 5
 |
SAE 8
 |
Socket Head
Cap Screws
 |
Minimum Tensile
Strength PSI |
120,000 |
150,000 |
1/4-1/2" 180,000
5/8-1" 170,000 |
Nominal Dia.
and
Thread Pitch |
Torque in Pound Foot or (Pound Inch) |
| Dry |
Lubed |
Dry |
Lubed |
Dry |
Lubed |
| 1/4-20 |
(101) |
(76) |
(143) |
(107) |
(168) |
(120) |
|
1/4-28 |
(116) |
(87) |
(147) |
(123) |
(192) |
(144) |
|
5/16-18 |
(209) |
(157) |
(295) |
(221) |
(348) |
(264) |
|
5/16-24 |
(231) |
(174) |
(327) |
(245) |
(384) |
(288) |
|
3/8-16 |
(372) |
(276) |
44 |
33 |
51 |
38 |
|
3/8-24 |
(420) |
(312) |
49 |
37 |
58 |
43 |
|
7/16-14 |
49 |
37 |
70 |
52 |
81 |
61 |
|
7/16-20 |
55 |
41 |
78 |
58 |
91 |
68 |
|
1/2-13 |
75 |
57 |
106 |
80 |
124 |
93 |
|
1/2-20 |
85 |
64 |
120 |
90 |
140 |
105 |
|
5/8-11 |
150 |
113 |
212 |
159 |
238 |
179 |
|
5/8-18 |
170 |
127 |
240 |
180 |
270 |
202 |
|
3/4-10 |
267 |
200 |
376 |
282 |
423 |
317 |
|
3/4-16 |
297 |
223 |
420 |
315 |
472 |
354 |
| 7/8-9 |
429 |
322 |
606 |
455 |
682 |
511 |
| 7/8-14 |
474 |
355 |
669 |
502 |
752 |
564 |
|
1-8 |
644 |
483 |
909 |
681 |
1022 |
767 |
|
1-12 |
722 |
542 |
1020 |
765 |
1147 |
860 |
Lubed means cleaned dry bolts lubricated with a standard medium viscosity
machine oil. Lubricate all contact areas of the bolts and washers. Lubricating
the bolts is the suggested method. Thread Engagement
|
Note: Much effort has been made to make sure that this information is accurate. However, it is the user's responsibility to verify that the provided information is correct before using it.