Tightening Torque of Standard Bolts

TIGHTENING TORQUE OF STANDARD BOLTS


Description

This vehicle has both new standard based on ISO* and previous standard bolts/nuts. There are some differences between these two types of bolts/nuts: shape of the head, grade of strength, hexagonal width across flats and the standard tightening torque.
- For guidance in discriminating, refer to Tightening Torque of Standard Bolts.
- The new standard machine screws and tapping screws have a head of ISO standard torx recess.
- If the tightening torque is not described in the description or figure, refer to Tightening Torque of Standard Bolts.
*ISO: International Organization for Standardization





TIGHTENING TORQUE OF STANDARD BOLTS


Tightening Torque Table (New Standard Included)


CAUTION:
- The special parts are excluded.
- The bolts/nuts in these tables have a strength (discrimination) number/symbol assigned to the head or the like. As to the relation between the strength grade in these tables and the strength (discrimination) number/symbol, refer to "DISCRIMINATION OF BOLTS AND NUTS".

PREVIOUS STANDARD






CAUTION:
The parts with aluminum or the cast iron washer surface/thread surface are excluded.

NEW STANDARD BASED ON ISO






CAUTION:
1. Use tightening torque with lubricant for the new standard bolts/nuts in principle. Friction coefficient stabilizer is applied to the new standard bolts/nuts.
2. However, use tightening torque without lubricant for the following cases. Friction coefficient stabilizer is not applied to the following bolts/nuts.
- Grade 4.8, M6 size bolt, Conical spring washer installed
- Paint removing nut (Size M6 and M8) for fixing with weld bolt

DISCRIMINATION OF BOLTS AND NUTS