General Information: 0A-4
JIS-TO-ISO main fasteners comparison table
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).
Nominal diameter
M6
M8 M10 M12 M14
JIS
Thread pitch
1.0 1.25 1.25 1.25 1.5
Width across flats
10
12
14
17
19
ISO
Thread pitch
1.0 1.25 1.5
1.5
1.5
Width across flats
10
13
16
18
21
1. Nut strength identification
I4RH0A010005-01
I5RH01010001-01
Содержание Wagon R
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