Natural PA Anti-Loss Washer Retaining Washer - 8.7 mm | 0.344 in; 12.7 mm | 0.500 in; Thickness 0.8 mm | 0.032 in; Compatible Screw Sizes 1/4

Designed to grip outside of screw shank. Easily slides on to the screw and is retained by the screw once assembled. Ideal when pre-assembly of the screw and washer is required. Reduces assembly time and cost.