G 6 GENERAL TIGHTENING TORQUES OF STANDARD BOLTS & NUTS Wherever the tightening torques are not specified use the following values for these fastners. Grade Bolt or Nut Size Pitch (mm) Tightening N-m Torque kg-m M6 1.0 8.5 - 10 0.85 - 1.0 M8 1.25 21 - 25 2.1 - 2.5 M10 1.5 41 - 51 4.1 - 5.1 1.0 46 - 56 4.6 - 5.6 M12 1.75 72 - 88 7.2 - 8.8 1.5 75 - 91 7.5 - 9.1 M14 2.0 113 - 138 11.3 - 13.8 1.5 126 -154 12.6 - 15.4 M16 2.0 176 - 215 17.6 - 21.5 1.5 189 - 231 18.9 - 23.1 M6 1.0 12 - 14 1.2 - 1.4 M8 1.25 29 - 35 2.9 - 3.5 1.0 32 - 39 3.2 - 3.9 M10 1.5 58 - 70 5.8 - 7.0 1.0 64 - 78 6.4 - 7.8 M12 1.75 99 - 121 9.9 - 12.1 1.5 104 - 127 10.4 - 12.7 M14 2.0 162 - 198 16.2 - 19.8 1.5 176 - 215 17.6 - 21.5 M16 2.0 248 - 303 24.8 - 30.3 1.5 266 - 325 26.6 - 32.5 Bolt 8.8 Nut 8.0 Bolt 10.9 Nut 10.0 1. This standard is applicable to the bolts having the following marks embossed on the bolt head and punch mark on the nut head. Grade 8.8 For the Bolt 10.9 For the Bolt 8 For the Nut 10 For the Nut Note : Always use the calibrated torque wrenches. 2. Nyloc nuts and copper washer should not be re-used
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