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(8 Pack) Hard-to-Find Spring Steel Push-On Pushnuts - Dolly Wheel Lock Washer...
USD 15.63
Lock washers, push-on nuts, or pushnuts were first designed to serve as retainers for bolts in car bumpers before the final assembly. The spring force produced by its teeth allows the pushnut to create more friction between itself and the shaft increasing its rotational resistance.
