CHANGHE FREEDOM SERVICE MANUAL GENERAL INFORMATION
FASTENERS STANDARD INFORMAITON
Metric Fasteners Measurement Standard
Most of the fasteners used for this vehicle are metric，
When replacing any fasteners, it is most important that
replacement fasteners be the correct diameter, thread pitch
and strength.
Metric Fasteners Strength Identification
Most commonly used metric fastener strength property
classes are 4T, 6.8, 7T, 8.8 and radial line with the class
identification embossed on the head of each bolt. Some
metric nuts will be marked with punch, 6 or 8 mark strength
identification on the nut face. Left figure shows the different
strength markings.
Nut strength mark
When replacing metric fasteners, be careful to use bolts and nuts of the same strength or greater
than the original fasteners (the same number marking or higher). It is likewise important to select
replacement fasteners of the correct diameter and thread pitch. Correct replacement bolts and nuts are
available through the parts division.
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