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Standard Torque for Dry, Zinc Plated and Steel Fasteners (Metric Fasteners)
Thread
Size
Thread Size
Class 8.8 Bolts, Screws and Studs with
Regular
Height Nuts
Regular Height Nuts
(Class 8 or Stronger Nuts)
Class 10.9 Bolts, Screws and Studs with
Regular
Height Nuts
Regular Height Nuts
(Class 10 or Stronger Nuts)
M5 X 0.8 57 + 5 in–lb 640 + 60 N–cm 78 + 7 in–lb 885 + 80 N–cm
M6 X 1.0 96 + 9 in–lb 1018 + 100 N–cm 133 + 13 in–lb 1500 + 150 N–cm
M8 X 1.25 19 + 2 ft–lb 26 + 3 N–m 27 + 2 ft–lb 36 + 3 N–m
M10 X 1.5 38 + 4 ft–lb 52 + 5 N–m 53 + 5 ft–lb 72 + 7 N–m
M12 X 1.75 66 + 7 ft–lb 90 + 10 N–m 92 + 9 ft–lb 125 + 12 N–m
M16 X 2.0 166 + 15 ft–lb 225 + 20 N–m 229 + 22 ft–lb 310 + 30 N–m
M20 X 2.5 325 + 33 ft–lb 440 + 45 N–m 450 + 37 ft–lb 610 + 50 N–m
Product Records
and Maintenance
NOTE: Reduce torque values listed in the table above
NOTE: The nominal torque values listed above are
by 25% for lubricated fasteners. Lubricated fasteners
based on 75% of the minimum proof load specified in
are defined as threads coated with a lubricant such as
SAE J1199. The tolerance is approximately +
10% of the
oil, graphite or thread sealant such as Loctite.
nominal torque value.
NOTE: Torque values may have to be reduced when
installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based
on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
ProCore 648
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Product Records and Maintenance