Split Lock Washer, Spring Lock, Alloy Steel, Finish Yellow Zinc Plated, Fits Bolt Sizes 1/2 In., 1/2 In., Inside Dia. 0.502 In., Outside Dia. 0.869 In., Thickness 1/8 In., Color Gray, General Purpose, Meets/Exceeds ASME B 18.22. 1, Package Quantity 25