Metric Information; Metric Fasteners; Fasteners Strength Identification - Suzuki sq-416-420-625 Service Manual

METRIC BOLTS–IDENTIFICATION CLASS NUMBERS
OR MARKS CORRESPOND TO BOLT
STRENGTH–INCREASING NUMBERS REPRESENT
INCREASING STRENGTH.

METRIC INFORMATION

METRIC FASTENERS

Most of the fasteners used for this vehicle are metric fasteners.
When replacing any fasteners, it is most important that replacement
fasteners be the correct diameter, thread pitch and strength.
FASTENER 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. Figure
shows the different strength markings.
When replacing metric fasteners, be careful to use bolts and nuts
of the same strength or greater than the original fasteners (the
NUT STRENGTH
same number marking or higher). It is likewise important to select
IDENTIFICATION
replacement fasteners of the correct diameter and thread pitch.
Correct replacement bolts and nuts are available through the parts
division.
GENERAL INFORMATION 0A-23