8.8 Metric Nylon Lock Nuts

Hexagon locking nuts with a nylon locking ring inserted. Self Locking nuts have a thread locking system that resist the screw reverse turning or backing off; most systems possess a thread interference characteristic that resists loosening under vibration. They are referred to as ‘prevailing torque nuts’ or 'stiff nuts'.

 Class 8.8 is similar to grade 5. 

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