Features The large outside diameter makes these Fender Washers ideal for applications that require the force/stress of nuts and bolts to be distributed over extra-wide bearing surfaces. They can also be used for covering oversized holes. Large OD washers have an outside diameter that is approximately 3 times the bolt diameter. Washer Basic Material / Steel System of Measurement / Inch Washer Material Grade / Low Carbon Fastener Finish / Zinc Plated Fits Bolt Sizes / 3/8 in Washer Inside Dia. / 13/32 in Washer Outside Dia. / 1 1/2 in Thickness / 0.047 in Thickness Tolerance / +/-0.005 in Rockwell Hardness / B40 For Use With / Screws and Studs Washer Standards / ASME B18.22.1 Package Weight / 1.19 lb Package Quantity / 50