Lock Washer, Internal/External Tooth, Type A, Carbon Steel, Finish Zinc, Fits Bolt Sizes 1/4 In., Inside Dia. 0.267 In., Outside Dia. 0.760 In., Thickness 0.040 In., Rockwell Hardness C40 to C50, Helps Prevent Loosening, For Use With Bolts and Nuts, Meets/Exceeds ASME B 18.21. 1, Refills -, Package Quantity 100. This item has been restricted from sale in the following state (s): []