Overview Reviews Product Description The high collar lock washer is designed to be used with socket head cap screws. The lock washers reduced outer diameter matches the cap screws heads outer diameter allowing it to recess into piloted holes without interference. Brighton Best General Catalog Product Videos Custom Field Box quantity 100 (sold as each) Finish Black oxide Material Steel Product Reviews Write a Review Write a Review × Brighton Best #4 Hi-Collar Socket Head Cap Screw Lock Washer - Black Oxide 013004 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *