GENERAL SERVICE INFORMATION
BY Service Manual
3-19
Tightening Torques for Standard Bolts and Nuts
TIGHTENING TORQUES FOR STANDARD BOLTS AND NUTS
Tightening Fasteners
Use the correct amount of torque when tightening fasteners. Applying excessive torque may damage the
fastener or component and not enough torque may cause a leak or component failure.
Hexagon Bolts and Nuts
Hose Clamps
Note: Reuse and retightening is prohibited for
all hose clamps. Always install new hose
clamps.
Nominal
Diameter
Grade (Lubricated)
8.8 or 8 10.9 or 10 12.9 or 12
M4 2.7 N·m (24 in.-lb) 3.88 N·m (34.3 in.-lb) 4.6 N·m (41 in.-lb)
M5 5.5 N·m (48.6 in.-lb) 8 N·m (71 in.-lb) 9.5 N·m (84 in.-lb)
M6 9.5 N·m (84 in.-lb) 13 N·m (115 in.-lb) 16 N·m (142 in.-lb)
M7 15 N·m (133 in.-lb) 22 N·m (195 in.-lb) 26 N·m (230 in.-lb)
M8 23 N·m (204 in.-lb) 32 N·m (24 ft-lb) 39 N·m (29 ft-lb)
M8 x 1 25 N·m (221 in.-lb) 35 N·m (26 ft-lb) 42 N·m (31 ft-lb)
M10 46 N·m (34 ft-lb) 64 N·m (47 ft-lb) 77 N·m (57 ft-lb)
M10 x 1.25 49 N·m (36 ft-lb) 68 N·m (50 ft-lb) 82 N·m (60 ft-lb)
M12 80 N·m (59 ft-lb) 110 N·m (81 ft-lb) 135 N·m (100 ft-lb)
M12 x 1.5 88 N·m (65 ft-lb) 125 N·m (92 ft-lb) 150 N·m (111 ft-lb)
Size Specification
5mm Hex Head 1.0 - 1.5 N·m (8.9 - 13 in.-lb)
6mm Hex Head 2.5 - 3.5 N·m (22 - 31 in.-lb)
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