Service Information Guide (All) 14A-15 Strength category 8.8 9.8 9T Bolt head shape M6 - M16 Hex bolt Flange bolt Hex bolt Flange bolt M6 x 1 : 5.6 to 11.2 N・m { 0.6 to 1.1 kgf・m / 50 to 99 lb・in } : 6.6 to 12.2 N・m { 0.7 to 1.2 kgf・m / 58 to 108 lb・in } ― ― M8 x 1.25 : 13.4 to 25.7 N・m { 1.4 to 2.6 kgf・m / 10 to 19 lb・ft } : 15.3 to 28.4 N・m { 1.6 to 2.9 kgf・m / 11 to 21 lb・ft } : 16.7 to 30.4 N・m { 1.7 to 3.1 kgf・m / 12 to 22 lb・ft } : 18.1 to 33.6 N・m { 1.8 to 3.4 kgf・m / 13 to 25 lb・ft } M10 x 1.25 : 31.3 to 52.5 N・m { 3.2 to 5.4 kgf・m / 23 to 39 lb・ft } : 35.4 to 58.9 N・m { 3.6 to 6.0 kgf・m / 26 to 43 lb・ft } : 37.3 to 62.8 N・m { 3.8 to 6.4 kgf・m / 28 to 46 lb・ft } : 42.3 to 70.5 N・m { 4.3 to 7.2 kgf・m / 31 to 52 lb・ft } *M10 x 1.5 : 31.3 to 51.4 N・m { 3.2 to 5.2 kgf・m / 23 to 38 lb・ft } : 34.5 to 57.5 N・m { 3.5 to 5.9 kgf・m / 25 to 42 lb・ft } : 36.3 to 59.8 N・m { 3.7 to 6.1 kgf・m / 27 to 44 lb・ft } : 40.1 to 66.9 N・m { 4.1 to 6.8 kgf・m / 30 to 49 lb・ft } M12 x 1.25 : 69.3 to 104.0 N・m { 7.1 to 10.6 kgf・m / 51 to 77 lb・ft } : 77.7 to 116.5 N・m { 7.9 to 11.9 kgf・m / 57 to 86 lb・ft } : 75.5 to 113.8 N・m { 7.7 to 11.6 kgf・m / 56 to 84 lb・ft } : 85.0 to 127.5 N・m { 8.7 to 13.0 kgf・m / 63 to 94 lb・ft } *M12 x 1.75 : 64.8 to 96.1 N・m { 6.6 to 9.8 kgf・m / 48 to 71 lb・ft } : 71.4 to 107.2 N・m { 7.3 to 10.9 kgf・m / 53 to 79 lb・ft } : 71.6 to 106.9 N・m { 7.3 to 10.9 kgf・m / 53 to 79 lb・ft } : 79.5 to 119.2 N・m { 8.1 to 12.2 kgf・m / 59 to 88 lb・ft } M14 x 1.5 : 106.2 to 158.8 N・m { 10.8 to 16.2 kgf・m / 78 to 117 lb・ft } : 114.9 to 172.3 N・m { 11.7 to 17.6 kgf・m / 85 to 127 lb・ft } : 113.8 to 170.6 N・m { 11.6 to 17.4 kgf・m / 84 to 126 lb・ft } : 123.4 to 185.1 N・m { 12.6 to 18.9 kgf・m / 91 to 137 lb・ft } *M14 x 2 : 100.6 to 149.8 N・m { 10.3 to 15.3 kgf・m / 74 to 110 lb・ft } : 108.2 to 162.2 N・m { 11.0 to 16.5 kgf・m / 80 to 120 lb・ft } : 106.9 to 160.0 N・m { 10.9 to 16.3 kgf・m / 79 to 118 lb・ft } : 115.5 to 173.3 N・m { 11.8 to 17.7 kgf・m / 85 to 128 lb・ft } M16 x 1.5 : 154.3 to 232.5 N・m { 15.7 to 23.7 kgf・m / 114 to 171 lb・ft } : 171.1 to 256.7 N・m { 17.4 to 26.2 kgf・m / 126 to 189 lb・ft } : 160.0 to 240.3 N・m { 16.3 to 24.5 kgf・m / 118 to 177 lb・ft } : 176.9 to 265.3 N・m { 18.0 to 27.1 kgf・m / 130 to 196 lb・ft } *M16 x 2 : 147.6 to 221.4 N・m { 15.1 to 22.6 kgf・m / 109 to 163 lb・ft } : 162.5 to 243.8 N・m { 16.6 to 24.9 kgf・m / 120 to 180 lb・ft } : 153.0 to 229.5 N・m { 15.6 to 23.4 kgf・m / 113 to 169 lb・ft } : 168.5 to 252.7 N・m { 17.2 to 25.8 kgf・m / 124 to 186 lb・ft }