Flat Washer, For Screw Size 9/16" , Steel Chrome Plated Finish, 10 PK, Midwest Fastener, Mfr#: 74356

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.