TIGHTENING TORQUE OF STANDARD BOLTS T hten' to ' Grade Bolt or nut size . Bolt 01m Pitch mm lg mg we dlameter mm NM kgm Mb M6 6.0 1.0 3 - 4 0.3 - 0.4 2.2 - 2.9 1.25 8-11 0.8-1.1 5.8-8.0 M8 8.0 1.0 8-11 0.3-1.1 5.8-3.0 1.5 16-22 1.6-2.2 12-16 4T M10 10.0 1.25 16-22 1.6-2.2 12-16 1.75 26-36 2.7-3.7 20-27 M12 120 1.25 30-40 3.1-4.1 _22-30 M14 14.0 1.5 46-62 4.7-5.3 34-46 M6 6.0 1.0 6 - 7 0.6 - 0,7 4.3 - 5.1 1.25 14-18 1.4-1.8 10-13 MB 3.0 1.0 14-18 1.4-1.8 10-13 1.5 25-35 2.6-3.6 19-26 7T M10 10.0 1.25 26-36 2.7-3.7 20-27 1.75 45-61 4.6-6.2 . 33-45 M12 12.0 1.25 50-68 5.1 -6.9 1 37-50 M14 14.0 1.5 76-103 77-105 56-76 M6 6.0 1.0 8-11 0.8-1.1 5.8-8.0 1.25 19-25 1.9-2.5 14-18 , V. MB 8.0 . 1.0 20-27 2.0-2.8 14-20 1.5 36-50 3.7-5.1 27-37 9T M10 10.0 125 39-51 4.0-5.2 29-38 1.75 65 - 68 6.6 - 9.0 48 - 65 M12 12.0 1.25 . 72-97 73-99 53-72 M14 14.0 1.5 109-147 11.1-15.0 I 80-108 1. Special pans are excluded. 2. This standavd is applicable to bolts having me following marks embnsud on lhe bolt head. . Numinal diameter ' Grade Mark 4T 4 M 6 7 T L Nomlnal diameler of ball threads (Unit mm) 9 Metric screw threads - 6w.