Tightening torque – steel bolted joints, UNC
The table below contains tightening torques for steel bolted joints with UNC thread.
Thread UNC |
Diameter d mm |
Pitch P mm |
Stress area As mm² |
Property class according to ISO-898-1:2013 | ||||
4.6 | 5.8 | 8.8 | 10.9 | 12.9 | ||||
No 4 No 5 No 6 |
2,845 3,175 3,505 |
0,635 0,635 0,794 |
3,9 5,14 5,86 |
0,31 0,45 0,58 |
0,58 0,84 1,1 |
0,94 1,4 1,7 |
1,3 1,9 2,5 |
1,7 2,4 3,1 |
No 8 No 10 No 12 |
4,166 4,826 5,486 |
0,794 1,058 1,058 |
9,04 11,31 15,58 |
1 |
1,9 2,9 4,4 |
3,1 4,6 7 |
4,4 6,5 10 |
5,5 |
1/4 5/16 3/8 |
6,35 7,938 9,525 |
1,270 1,411 1,588 |
20,5 33,8 50,0 |
3,6 7,3 13 |
6,7 14 24 |
11 22 38 |
15 31 54 |
19 38 68 |
7/16 1/2 9/16 |
11,112 |
1,814 1,954 2,117 |
68,6 91,5 117 |
20 31 44 |
38 57 82 |
61 93 133 |
87 131 187 |
108 163 234 |
5/8 3/4 7/8 |
15,875 19,05 22,225 |
2,309 2,54 2,822 |
146 216 298 |
61 107 172 |
114 200 320 |
183 322 516 |
259 455 729 |
323 568 909 |
1 1 1/8 1 1/4 |
25,4 28,575 31,75 |
3,175 3,629 3,629 |
391 492 625 |
257 365 509 |
479 679 947 |
772 1090 1530 |
1090 1550 2160 |
1360 1930 2690 |
1 3/8 1 1/2 1 3/4 |
34,925 38,1 44,45 |
4,233 4,233 5,080 |
745 907 1225 |
672 884 1400 |
1250 1650 2600 |
2020 2650 4190 |
2850 3750 5930 |
3550 4680 7390 |
2 2 1/4 2 1/2 |
50,8 57,15 63,5 |
5,644 5,644 6,350 |
1612 2095 2580 |
2100 3030 4150 |
3900 5640 7720 |
6290 9090 12500 |
8890 12800 17600 |
11100 16000 21900 |
2 3/4 3 3 1/4 |
69,85 76,2 82,55 |
6,350 6,350 6,350 |
3183 3850 4580 |
5590 7320 9380 |
10400 13600 17740 |
16800 22000 28100 |
23700 31000 39800 |
29500 38700 49600 |
3 1/2 3 3/4 4 |
88,9 95,25 101,6 |
6,350 6,350 6,350 |
5373 6230 7150 |
11800 14600 17800 |
21900 27100 33100 |
35400 43700 53300 |
50000 61800 75400 |
62300 77100 94000 |
σs = ReL eller Rp0,2 N/mm² nominal | 248 | 393 | 634 | 896 | 1117 | |||
x σs N/mm² | 23,03 | 42,84 | 69,11 | 97,66 | 121,75 |