Item #: 15643356Brand: Electro HardwareModel #: FW-1180-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. Copper is soft, easy to shape, corrosion resistant and an excellent conductor of heat and electricity. It is used in building construction, transportation, electronics and power generation. Product Specifications Flat Washers; Type: Standard ; System of Measurement: Inch ; Screw Size: 3/8 ; Inside Diameter (Inch): 0.364 ; Outside Diameter (Inch): 0.47 ; Thickness (Decimal Inch): 0.0170 Type Standard System of Measurement Inch Screw Size 3/8 Inside Diameter (Inch) 0.364 Outside Diameter (Inch) 0.47 Thickness (Decimal Inch) 0.0170 Material Grade Commercial Material Copper Finish/Coating Uncoated Fastener Standard UL