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VEHICLE GENERAL
9. TIGHTENING TORQUE OF STANDARD BOLTS
Metric bolt strength is embossed on the
head of each bolt. The strength of bolt
can be classified as 4T, 7T, 8.8T, 10.9T,
11T and 12.9T in general.
Observe standard tightening torque
during bolt tightening works and can
adjust torque to be proper within 15 % i
f
necessary. Try not to over max. allowable
tightening torque if not required to do so.
1.
2.
Determine extra proper tightening torque
if tightens with washer or packing.
If tightens bolts on the below materials,
be sure to determine the proper torque.
3.
4.
Aluminum alloy: Tighten to 80 % o
f
above torque table.
Plastics: Tighten to 20 % of above
torque table.
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