Mason Nyloc Nut

A Nyloc Nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar insert that resists turning.

Brand: Mason

SIZE 
 M3 M4 M5 M6 M8 M10 M12
Pitch 0.5 0.7 0.8 1.0 1.25 1.5 1.75
Width
 5.5 7 8 10 13 17 19
Height
 4 5 5 6 8 10 12