Structural Flat Washer, Steel, Hot Dip Galvanized Finish, Fits Bolt Sizes 1/2 In, Inside Dia 17/32 In, Outside Dia 1 1/16 In, Thickness 0.097 to 0.177 In, Rockwell Hardness C26-45, Used For Structural Leveling, For Use With A325 and A490 Bolts, Meets/Exceeds ASTM F436, Package 50. This item has been restricted from sale in the following state (s): []