5/16 x 9/16 Chrome Plated Grade 2 Steel AN Washers (10 pcs.)
Diameter: 5/16Diameter 2: 9/16Thickness: 1/16Material: SteelFinish: ChromeThread Type: ANHardness: Grade 2Nominal Size: 5/16Style: ANType: Flat WasherBox 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.