Natural PA Anti-Loss Washer Retaining Washer - 11.9 mm | 0.470 in; 18.6 mm | 0.734 in; Thickness 1.6 mm | 0.062 in; Compatible Screw Sizes 5/16

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.