4-60 Inspection, Maintenance and Adjustment 022-00028AE Operation and Maintenance Manual
BOLT TORQUE CHART
TIGHTENING TORQUE SPECIFICATIONS FOR METRIC BOLTS (FOR COATED THREADS, PRE-
LUBRICATED ASSEMBLIES)
Grade Gr. 8.8 Gr. 10.9 Gr. 12.9
Dia. kg•m ft lb kg•m ft lb kg•m ft lb
5 mm x std 0.59 4.3 0.79 5.7 1.0 7.2
6 mm x std 1.00 7.3 1.38 10 1.66 12
8 mm x std 2.49 18 3.46254.1530
8 mm x 1.0 2.76 20 3.87284.5633
10 mm x std 4.84 35 6.92508.3060
10 mm x 1.0 4.84 35 7.05 51 8.30 60
12 mm x std 8.57 62 11.89 86 14.52 105
12 mm x 1.5 9.00 65 12.59 91 14.94 108
14 mm x std 13.55 98 18.95 137 23.10 167
14 mm x 1.5 14.94 108 21.02 152 24.89 180
16 mm x std 20.88 151 29.46 213 35.54 257
16 mm x 1.5 22.54 163 31.53 228 38.03 275
18 mm x std 28.90 209 40.52 293 48.41 350
18 mm x 1.5 32.50 235 45.92 332 55.04 398
20 mm x std 40.94 296 57.95 419 69.01 499
20 mm x 1.5 46.05 333 64.03 463 77.03 557
22 mm x std 54.90 397 77.86 563 93.08 673
22 mm x 1.5 61.00 441 86.02 622 105.00 759
24 mm x std 71.00 513 100.00 723 120.00 868
24 mm x 2.0 78.00 564 109.95 795 130.00 940
27 mm x 2.0 115.06 832 160.00 1157 195.00 1410
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