A Flat Annulus Or Ring, Usually Made Of Metal, Used To Spread The Load Of A Screwed Fastening . Also, A Plain washers Manufacturers Can Be Used When The Hole Is A Huge Diameter Than The Installing Nut | Plain Washers, Which copper Washers Spread A Load And Prevent Damage To The Surface Being Fixed. A ms Washers Is A Thin Plate (a Usual Disk-shaped) With A Hole (typically In The Middle) That Is Regularly Used To Distribute wave Washer The Load Of A Threaded Fastener, Like As A Screw Or Nut.size 8 Mm Hole And Outer Dia 18mm.