Item #: 19224898Brand: Electro HardwareModel #: FW-5651-EH Features and Benefits Flat washers are standard washers used for general-purpose fastening. They are placed under the head of a bolt or above a nut to distribute clamping force and prevent fasteners from pulling through materials. Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings. Product Specifications Flat Washers; Type: Standard ; System of Measurement: Inch ; Screw Size: 5/8 ; Inside Diameter (Decimal Inch): 0.6360 ; Outside Diameter (Decimal Inch): 1.1280 ; Thickness (Decimal Inch): 0.0530 Type Standard System of Measurement Inch Screw Size 5/8 Inside Diameter (Decimal Inch) 0.6360 Outside Diameter (Decimal Inch) 1.1280 Thickness (Decimal Inch) 0.0530 Material Grade Commercial Material Steel Finish/Coating Plain Fastener Standard UL