Item #: 15652639Brand: Electro HardwareModel #: FW-1739-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. Nylon is a lightweight, nonconductive material that is resistant to impact, wear and abrasion. It is ideal for electrical applications or where corrosion is a concern. Product Specifications Flat Washers; Type: Standard ; System of Measurement: Inch ; Screw Size: #4 ; Inside Diameter (Inch): 0.129 ; Outside Diameter (Inch): 0.812 ; Thickness (Decimal Inch): 0.0270 Type Standard System of Measurement Inch Screw Size #4 Inside Diameter (Inch) 0.129 Outside Diameter (Inch) 0.812 Thickness (Decimal Inch) 0.0270 Material Grade Commercial Material Nylon Finish/Coating Uncoated Fastener Standard UL