Tightening Torque Table
| Grade | Bolt size | Bolt diameter (1) mm | Pitch mm | Tightening torque (Without lubricant) |
| Hexagon head bolt | Hexagon flange bolt |
| N.m | Kg-m | Ft-lb | In-lb | N.m | Kg-m | Ft-lb | In-lb |
| 4T | M6 | 6.0 | 1.0 | 5.1 | 0.52 | 3.8 | 45.1 | 6.1 | 0.62 | 4.5 | 53.8 |
| M8 | 8.0 | 1.25 | 13 | 1.3 | 9 | | 15 | 1.5 | 11 | |
| 1.0 | 13 | 1.3 | 9 | | 16 | 1.6 | 12 | |
| M10 | 10.0 | 1.5 | 25 | 2.5 | 18 | | 29 | 3.0 | 22 | |
| 1.25 | 25 | 2.6 | 19 | | 30 | 3.1 | 22 | |
| M12 | 12.0 | 1.75 | 42 | 4.3 | 31 | | 51 | 5.2 | 38 | |
| 1.25 | 46 | 4.7 | 34 | | 56 | 5.7 | 41 | |
| M14 | 14.0 | 1.5 | 74 | 7.5 | 54 | | 88 | 9.0 | 65 | |
| 7T | M6 | 6.0 | 1.0 | 8.4 | 0.86 | 6.2 | 74.6 | 10 | 1.0 | 7 | 87 |
| M8 | 8.0 | 1.25 | 21 | 2.1 | 15 | | 25 | 2.5 | 18 | |
| 1.0 | 22 | 2.2 | 16 | | 26 | 2.7 | 20 | |
| M10 | 10.0 | 1.5 | 41 | 4.2 | 30 | | 48 | 4.9 | 35 | |
| 1.25 | 43 | 4.4 | 32 | | 51 | 5.2 | 38 | |
| M12 | 12.0 | 1.75 | 71 | 7.2 | 52 | | 84 | 8.6 | 62 | |
| 1.25 | 77 | 7.9 | 57 | | 92 | 9.4 | 68 | |
| M14 | 14.0 | 1.5 | 127 | 13.0 | 94 | | 147 | 15.0 | 108 | |
| 9T | M6 | 6.0 | 1.0 | 12 | 1.2 | 9 | | 15 | 1.5 | 11 | |
| M8 | 8.0 | 1.25 | 29 | 3.0 | 22 | | 35 | 3.6 | 26 | |
| 1.0 | 31 | 3.2 | 23 | | 37 | 3.8 | 27 | |
| M10 | 10.0 | 1.5 | 59 | 6.0 | 43 | | 70 | 7.1 | 51 | |
| 1.25 | 62 | 6.3 | 46 | | 74 | 7.5 | 54 | |
| M12 | 12.0 | 1.75 | 98 | 10.0 | 72 | | 118 | 12.0 | 87 | |
| 1.25 | 108 | 11.0 | 80 | | 137 | 14.0 | 101 | |
| M14 | 14.0 | 1.5 | 177 | 18.0 | 130 | | 206 | 21.0 | 152 | |
| (1) Nominal diameter |
TIGHTENING TORQUE SPECIFICATIONS
Scheme 1
- Special parts are excluded.
- This standard is applicable to bolts having the following marks embossed on the bolt head. see scheme 71: Bolt Head Embossed Marks Chart