1/4″ x 5/16″ x 3/4″ Chrome Grade 2 USS Flat Washers (10 pcs.)
Diameter: 5/16″ Diameter 2: 3/4″ Thickness: 1/16″ Material: Steel Finish: Chrome Thread Type: USS Hardness: Grade 2 Nominal Size: 1/4″ Type: Flat Washer Box of 10. A flat washer is a thin, usually round, plate with a hole in the middle that is normally used to distribute the load of a threaded fastener. USS flat washers have a large, wider body. SAE flat washers are machined to a tighter specification and have a smaller outside diameter.