4-58 Inspection, Maintenance and Adjustment K1000896E Operation and Maintenance Manual
BOLT TORQUE CHART
TIGHTENING TORQUE SPECIFICATIONS FOR METRIC BOLTS (FOR COATED THREADS,
PRELUBRICATED 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
8mmxstd 2.49 18 3.46254.1530
8mmx1.0 2.76 20 3.87284.5633
10 mm x std 4.84 35 6.92 50 8.30 60
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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