Lock Washer, Internal/External Tooth, Type A, Carbon Steel, Finish Zinc, Fits Bolt Sizes 5/16 In., Inside Dia. 0.332 In., Outside Dia. 0.900 In., Thickness 0.040 In., Rockwell Hardness C40 to C50, Helps Prevent Loosening, For Use With Bolts and Nuts, Meets/Exceeds ASME B18.21.1, Refills -, Package Quantity 100








