Flat Washer, For Screw Size M6 , Steel Zinc Plated Finish, 25 PK, Midwest Fastener, Mfr#: 78544

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.