螺母 规格表

Nylon insert lock nuts can be reused 3–5 times, but locking effectiveness decreases as the nylon wears. New nuts are recommended for critical joints.

Yes, nuts must be equal to or stronger than the bolt. Use grade 8 or higher nuts with grade 8.8 bolts to prevent failure.

Flange nuts provide a wide bearing surface so a separate washer is generally unnecessary. However, a washer may still be added for soft materials or special sealing requirements.