Metric Information; Metric Fasteners; Fastener Strength Identification - Suzuki Samurai 1986 Service Manual

O-5. METRIC INFORMATION

METRIC FASTENERS

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 BOLTS - IDENTIFICATION CLASS NUMBERS OR MARKS CORRESPOND TO
BOLT STRENGTH - INCREASING NUMBERS REPRESENT INCREASING STRENGTH.
Fig. O- 10 Bolt Strength Markings
0-12

FASTENER STRENGTH IDENTIFICATION

Most commonly used metric fastener strength
property classes are 4T, 7T and radial line with
the class identification embossed on the head of
each bolt. Some metric nuts will be marked with
punch mark strength identification on the nut
face. Fig. O-10 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 same
number marking or higher). It is likewise impor-
tant to select replacement fasteners of the
correct size. Correct replacement bolts and
nuts are available through the parts department.
NUT STRENGTH
IDENTIFICATION