Item #: 15716970Brand: Electro HardwareModel #: FW-3985-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: 3/8 ; Inside Diameter (Inch): 0.447 ; Outside Diameter (Inch): 1.131 ; Thickness (Decimal Inch): 0.0410 Type Standard System of Measurement Inch Screw Size 3/8 Inside Diameter (Inch) 0.447 Outside Diameter (Inch) 1.131 Thickness (Decimal Inch) 0.0410 Material Grade Commercial Material Steel Finish/Coating Uncoated Fastener Standard UL