MIDWEST FASTENER Flat Washer, 1/4 in ID, USS Grade, Stainless Steel, Package Quantitiy: 100
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.