5/16" x 3/8" x 7/8" Zinc Plated Grade 2 Steel USS Flat Washers

Diameter: 3/8"
Diameter 2: 7/8"
Thickness: 5/64"
Material: Steel
Finish: Zinc
Thread Type: USS
Hardness: Grade 2
Nominal Size: 5/16"
Type: Flat Washer
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.