Best used as mounting hardware, 1/4 Inch Split Lock Washer, for skid plates and rudder brackets common on Perception and Wilderness Systems kayaks. Can be used with with 10-32 screws or 1/4-20 screws.

Washer is approximately 1/2 inch OD and 1/4 inch ID. OD = outside dimensions. ID = inside dimensions.

Alternative part numbers 9820138 and 9800503.