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NLGI0010 Grade Bolt size Bolt diam- eter * 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 — *: Nominal diameter Special parts are excluded. 2) This standard is applicable to bolts having the following marks embossed on the bolt head. MGI044A TIGHTENING TORQUE OF STANDARD BOLTS GI-48 |