Metric Bolt And Cap Screw Torque Values - Hammerhead HG375 Parts Manual

Metric Bolt and Cap Screw Torque Values

Metric Bolt and Cap Screw Torque Values
Size Class 4.8
Lubricated Dry
N-m ft-lb N-m ft-lb
M6 4.8 3.5
M8 12 8.5
M10 23 17
M12 40 29
M14 63 47
M16 100 73
M18 135 100
M20 190 140
M22 260 190
M24 330 250
M27 490 360
M30 675 490
M33 900 675 1150
M36 1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
Do not use these values if a different torque value or tightening procedure is given for specific application.
Do not use these values if a different torque value or tightening procedure is given for specific application.
Torque values listed are for general use only. Check tightness of fasteners periodically. Torque values listed are for general use only. Check tightness of fasteners periodically.
Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with identical property
Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with identical
class fasteners.
property class fasteners.
Fasteners should be replaced with the same or higher property class. If higher property class fasteners are used,
Fasteners should be replaced with the same or higher property class. If higher property class fasteners are
these should only be tightened to strength of original.
used, these should only be tightened to strength of original.
Make sure fastener threads are clean and that the threads are properly started. This will prevent them from
Make sure fastener threads are clean and that the threads are properly started. This will prevent them from
cross threading or galling when tightened.
cross threading or galling when tightened.
Tighten plastic insert or crimped type steel locknuts to approximately 50% of dry torque indicated on chart.
Tighten plastic insert or crimped type steel locknuts to approximately 50% of dry torque indicated on chart.
Apply torque to the nut – not the bolt head. Tighten toothed or serrated type locknuts to full torque value.
Apply torque to the nut – not the bolt head. Tighten toothed or serrated type locknuts to full torque value.
LUBRICATED means coated with lubricant. DRY means plain or zinc plated without any type of lubricant.
LUBRICATED means coated with lubricant. DRY means plain or zinc plated without any type of lubricant.
Class 8.8 and 9.8
Lubricated Dry
N-m ft-lb
6 4.5 9 6.5
15 11 22 16
29 21 43 32
50 37 75 55
80 60 120 88
125 92 190 140
175 125 260 195
240 180 375 275
330 250 510 375
425 310 650 475
625 450 950 700 1200
850 625 1600 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
Class 10.9
Lubricated Dry
N-m ft-lb N-m ft-lb
11 8.5 13
28 20 32
55 40 63
95 70 110
150 110 175 130
240 175 275 200
330 250 375 275
475 350 530 400
650 475 725 540
825 600 925 675 1150
875 1350 1000 1700 1250 1600 1150 2000 1500
379
279
Class 12.9
Lubricated Dry
N-m ft-lb N-m ft-lb
9.5 17 12 15
24 40 30 37
47 80 60 75
80 140 105 130
225 165 205
350 225 320
475 350 440
675 500 625
925 675 850
850 1075
N-m ft-lb
11.5 19 14.5
28 47 35
55 95 70
95 165 120
150 260 190
240 400 300
325 560 410
460 800 580
625 1075 800
800 1350 1000