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INTRODUCTION – STANDARD BOLT TORQUE SPECIFICATIONS
SPECIFIED TORQUE FOR STANDARD BOLTS
Specified torque
Class | Diameter Mm | Pitch mm | Hexagon head bolt | Hexagon flange bolt
N·m | kgf·cm | ft·lbf | N·m | kgf·cm | ft·lbf
4T
6 | 1 | 5 | 55 | 48 in.·lbf | 6 | 60 | 52 in.·lbf
8 | 1.25 | 12.5 | 130 | 9 | 14 | 145 | 10
10 | 1.25 | 26 | 260 | 19 | 29 | 290 | 21
12 | 1.25 | 47 | 480 | 35 | 53 | 540 | 39
14 | 1.5 | 74 | 760 | 55 | 84 | 850 | 61
16 | 1.5 | 115 | 1,150 | 83 | – | – | –
5T
6 | 1 | 6.5 | 65 | 56 in.·lbf | 7.5 | 75 | 65 in.·lbf
8 | 1.25 | 15.5 | 160 | 12 | 17.5 | 175 | 13
10 | 1.25 | 32 | 330 | 24 | 36 | 360 | 26
12 | 1.25 | 59 | 600 | 43 | 65 | 670 | 48
14 | 1.5 | 91 | 930 | 67 | 100 | 1,050 | 76
16 | 1.5 | 140 | 1,400 | 101 | – | – | –
6T
6 | 1 | 8 | 80 | 69 in.·lbf | 9 | 90 | 78 in.·lbf
8 | 1.25 | 19 | 195 | 14 | 21 | 210 | 15
10 | 1.25 | 39 | 400 | 29 | 44 | 440 | 32
12 | 1.25 | 71 | 730 | 53 | 80 | 810 | 59
14 | 1.5 | 110 | 1,100 | 80 | 125 | 1,250 | 90
16 | 1.5 | 170 | 1,750 | 127 | – | – | –
7T
6 | 1 | 10.5 | 110 | 8 | 12 | 120 | 9
8 | 1.25 | 25 | 260 | 19 | 28 | 290 | 21
10 | 1.25 | 52 | 530 | 38 | 58 | 590 | 43
12 | 1.25 | 95 | 970 | 70 | 105 | 1,050 | 76
14 | 1.5 | 145 | 1,500 | 108 | 165 | 1,700 | 123
16 | 1.5 | 230 | 2,300 | 166 | – | – | –
8T
8 | 1.25 | 29 | 300 | 22 | 33 | 330 | 24
10 | 1.25 | 61 | 620 | 45 | 68 | 690 | 50
12 | 1.25 | 110 | 1,100 | 80 | 120 | 1,250 | 90
9T
8 | 1.25 | 34 | 340 | 25 | 37 | 380 | 27
10 | 1.25 | 70 | 710 | 51 | 78 | 790 | 57
12 | 1.25 | 125 | 1,300 | 94 | 140 | 1,450 | 105
10T
8 | 1.25 | 38 | 390 | 28 | 42 | 430 | 31
10 | 1.25 | 78 | 800 | 58 | 88 | 890 | 64
12 | 1.25 | 140 | 1,450 | 105 | 155 | 1,600 | 116
11T
8 | 1.25 | 42 | 430 | 31 | 47 | 480 | 35
10 | 1.25 | 87 | 890 | 64 | 97 | 990 | 72
12 | 1.25 | 155 | 1,600 | 116 | 175 | 1,800 | 130