Metric Fasteners
Most of the fasteners used for this vehicle are JIS-defined and ISO-defined metric fasteners. When replacing any fasteners, it is most important that replacement fasteners be the correct diameter, thread pitch and strength.
CAUTION:
Even when the nominal diameter (1) of thread is the same, the thread pitch (2) or the width across flats (3) may vary between ISO and JIS. Refer to JIS-TO-ISO MAIN FASTENERS COMPARISON TABLE below for the difference.
Installing a mismatched bolt or nut will cause damage to the thread.
Before installing, check the thread pitch for correct matching and then tighten it by hand temporarily. If it is tight, recheck the thread pitch.
Installing a mismatched bolt or nut will cause damage to the thread.
Before installing, check the thread pitch for correct matching and then tighten it by hand temporarily. If it is tight, recheck the thread pitch.
JIS-TO-ISO Main Fasteners Comparison Table
MAIN FASTENERS COMPARISON REFERENCE
| 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 | |