Suzuki SWIFT RS415 2017, Service Manual

Page: 24 / 1257

0A-3 General Information:
Fasteners Information
S4RS0A0101004
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.
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 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.
Metric bolts: Identification class numbers or marks
correspond to bolt strength (increasing numbers
represent increasing strength).
Standard Tightening Torque
Each fastener should be tightened to the torque specified in each section. If no description or specification is provided,
refer to the following tightening torque chart for the applicable torque for each fastener. When a fastener of greater
strength than the original one is used, however, use the torque specified for the original fastener.
NOTE:
• For the flanged bolt, flanged nut and self-lock nut of 4T and 7T strength, add 10% to the tightening
torque given in the following chart.
• The following chart is applicable only where the fastened parts are made of steel light alloy.
Tightening torque chart
I2RH01010010-
1. Nut strength identification
I5RH01010001-
Strength Unit
Thread diameter (Nominal diameter) (mm)
4 5 6 8 10 12 14 16 18
A equivalent of 4T strength fastener N
˜
m 1.5 3.0 5.5 13 29 45 65 105 160
kg-m 0.15 0.30 0.55 1.3 2.9 4.5 6.5 10.5 16
lb-ft 1.0 2.5 4.0 9.5 21.0 32.5 47.0 76.0 116.0
I2RH01010012-01