Service Information Guide (All) 14A-13 Standard bolts 1. List of standard bolt and nut tightening torques Note Those indicated with an asterisk (*) are used for the internal threaded portion of soft materials such as castings. The tightening torque values in the following table apply to locations where no tightening torque is specified.
Strength category 4.8 4T 7T Bolt head shape M6 - M16 Hex bolt Flange bolt Hex bolt Flange bolt M6 x 1 ： 3.9 to 7.8 N・m { 0.4 to 0.8 kgf・m / 35 to 69 lb・ in } ： 4.6 to 8.5 N・m { 0.5 to 0.9 kgf・m / 41 to 75 lb・ in } ： 4.9 to 9.8 N・m { 0.5 to 1.0 kgf・m / 43 to 87 lb・ in } ： 5.7 to 10.6 N・m { 0.6 to 1.1 kgf・m / 50 to 94 lb・in } M8 x 1.25 ： 7.8 to 17.7 N・m { 0.8 to 1.8 kgf・m / 69 to 157 lb・in } ： 10.5 to 19.6 N・m { 1.1 to 2.0 kgf・m / 93 to 173 lb・in } ： 11.8 to 22.6 N・m { 1.2 to 2.3 kgf・m / 9 to 17 lb・ ft } ： 13.5 to 25.0 N・m { 1.4 to 2.5 kgf・m / 10 to 18 lb・ft } M10 x 1.25 ： 20.6 to 34.3 N・m { 2.1 to 3.5 kgf・m / 15 to 25 lb・ft } ： 23.1 to 38.5 N・m { 2.4 to 3.9 kgf・m / 17 to 28 lb・ft } ： 27.5 to 46.1 N・m { 2.8 to 4.7 kgf・m / 20 to 34 lb・ft } ： 31.0 to 51.7 N・m { 3.2 to 5.3 kgf・m / 23 to 38 lb・ft } *M10 x 1.5 ： 19.6 to 33.3 N・m { 2.0 to 3.4 kgf・m / 14 to 25 lb・ft } ： 22.3 to 37.2 N・m { 2.3 to 3.8 kgf・m / 16 to 27 lb・ft } ： 27.5 to 45.1 N・m { 2.8 to 4.6 kgf・m / 20 to 33 lb・ft } ： 30.3 to 50.4 N・m { 3.1 to 5.1 kgf・m / 22 to 37 lb・ft } M12 x 1.25 ： 49.0 to 73.5 N・m { 5.0 to 7.5 kgf・m / 36 to 54 lb・ft } ： 54.9 to 82.3 N・m { 5.6 to 8.4 kgf・m / 40 to 61 lb・ft } ： 60.8 to 91.2 N・m { 6.2 to 9.3 kgf・m / 45 to 67 lb・ft } ： 68.1 to 102.1 N・m { 6.9 to 10.4 kgf・m / 50 to 75 lb・ft } *M12 x 1.75 ： 45.1 to 68.6 N・m { 4.6 to 7.0 kgf・m / 33 to 51 lb・ft } ： 51.0 to 76.5 N・m { 5.2 to 7.8 kgf・m / 38 to 56 lb・ft } ： 56.9 to 84.3 N・m { 5.8 to 8.6 kgf・m / 42 to 62 lb・ft } ： 62.7 to 94.0 N・m { 6.4 to 9.6 kgf・m / 46 to 69 lb・ft } M14 x 1.5 ： 76.5 to 114.7 N・m { 7.8 to 11.7 kgf・m / 56 to 85 lb・ft } ： 83.0 to 124.5 N・m { 8.5 to 12.7 kgf・m / 61 to 92 lb・ft } ： 93.2 to 139.3 N・m { 9.5 to 14.2 kgf・m / 69 to 103 lb・ft } ： 100.8 to 151.1 N・m { 10.3 to 15.4 kgf・m / 74 to 111 lb・ft } *M14 x 2 ： 71.6 to 106.9 N・m { 7.3 to 10.9 kgf・m / 53 to 79 lb・ft } ： 77.2 to 115.8 N・m { 7.9 to 11.8 kgf・m / 57 to 85 lb・ft } ： 88.3 to 131.4 N・m { 9.0 to 13.4 kgf・m / 65 to 97 lb・ft } ： 94.9 to 142.3 N・m { 9.7 to 14.5 kgf・m / 70 to 105 lb・ft } M16 x 1.5 ： 104.0 to 157.0 N・m { 10.6 to 16.0 kgf・m / 77 to 116 lb・ft } ： 115.6 to 173.3 N・m { 11.8 to 17.7 kgf・m / 85 to 128 lb・ft } ： 135.3 to 204.0 N・m { 13.8 to 20.8 kgf・m / 100 to 150 lb・ft } ： 150.1 to 225.2 N・m { 15.3 to 23.0 kgf・m / 111 to 166 lb・ft } *M16 x 2 ： 100.0 to 149.1 N・m { 10.2 to 15.2 kgf・m / 74 to 110 lb・ft } ： 109.4 to 164.2 N・m { 11.2 to 16.7 kgf・m / 81 to 121 lb・ft } ： 129.4 to 194.2 N・m { 13.2 to 19.8 kgf・m / 95 to 143 lb・ft } ： 142.5 to 213.8 N・m { 14.5 to 21.8 kgf・m / 105 to 158 lb・ft }