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STANDARD STEEL BOLT TORQUE VALUES *

 

SAE GRADE

 
BOLT SIZE

1 OR 2

Grade 1-2  Bolt Head

Dia. - Threads

Per In.

Ft.Lbs kgm Nm
1/4" - 20 5 0.7 6.8
1/4" - 28 6 0.8 8.1
5/16" - 18 11 1.5 14.9
5/16"- 24 13 1.8 17.6
3/8" - 16 18 2.5 24.4
3/8" - 24 20 2.75 27.1
7/16" - 14 28 3.8 37
7/16" - 20 30 4.2 40.7
1/2" - 13 39 5.4 52.8
1/2" - 20 41 5.7 55.6
9/16" - 12 51 7 69.2
9/16" - 18 55 7.6 74.5
5/8" - 11 83 11.5 112.5
5/8" - 18 95 13.1 128.8
3/4" - 10 105 14.5 142.3
3/4" - 16 115 15.9 155.9
7/8"- 9 160 22.1 216.9
7/8" - 14 175 24.2 237.2
1" - 8 236 32.5 318.6
1" - 14 250 34.6 338.9
 

SAE GRADE

 
BOLT SIZE

5

Grade 5 Bolt Head

6 OR 7

Grade 6-7 Bolt Head

8

Grade 8 Bolt Head

Dia. - Threads

Per In.

Ft.-Lbs kgm NM Ft. -Lbs kgm NM Ft. -Lbs kgm NM
1/4" - 20 1.1 10.8 10 1.4 13.5 12 1.67 16
1/4" - 28 10 1.4 13.6       14 1.93 19
5/16" - 18 17 2.3 23 19 2.6 25.8 24 3.3 33
5/16"- 24 19 2.6 25.7       26 3.6 35
3/8" - 16 31 4.3 42 34 4.7 46 44 6.1 60
3/8" - 24 35 4.8 47.5       49 6.8 66
7/16" - 14 49 6.8 66.4 55 7.6 74.5 71 9.8 96
7/16" - 20 55 7.6 74.5       77 10.6 104
1/2" - 13 75 10.4 101.7 85 11.75 115.2 104 14.4 141
1/2" - 20 85 11.7 115.2       121 16.7 164
9/16" - 12 110 15.2 149 120 16.6 162.7 154 21 209
9/16" - 18 120 16.6 162.7       170 23.5 230
5/8" - 11 150 20.7 203.3 167 23 226.5 209 28.9 283
5/8" - 18 170 23.5 230.5       236 32.6 319
3/4" - 10 270 37.3 366 280 38.7 379.6 374 51.7 507
3/4" - 16 295 40.8 400       418 57.8 566
7/8"- 9 395 54.6 535.5 440 60.9 569.5 605 83.6 820
7/8" - 14 435 60.1 589.7       671 92.7 909
1" - 8 590 81.6 799.9 660 91.3 894.8 902 124.6 1222
1" - 14 660 91.3 849.8       979 135 1327

 

 

* Values based on clean and dry threads. Reduce values by 10% if threads are oiled.

Example: 30 ft.-lbs. X .10 = 3 ft-lbs. Oiled value of 27 ft.-lbs. should be used.

To convert: Ft.-lbs to in.-lbs: 30 ft.-lbs x 12= 360 in.-lbs

Ft.-lbs to NM: 30 ft.-lbs x 1.3556= 40.668 NM

Ft.-lbs to kgm: 30 ft.-lbs x .138185525= 4.146 kgm