M10 Nylon Form A Flat Washer DIN125A

This is a plain flat nylon washers form A which denotes the outside diameter of the flat washers The washers are DIN125A standard which are used to spread the load when tightening fasteners, so the nuts and bolts have a good contact surface to assist in keeping the nut or bolt secure.  Washers also take the pressure from just a small space by spreading the load from the component side to prevent wear in the connection of the fastening.

These nylon fasteners are used when a softer grip on the surface of the application is needed to prevent damage.  Can be used in conjunction with nylon nuts and bolts.

More information is available from Central Fasteners regarding fastener details, but its always worth checking with a manufacturer's specifications or drawings if an alternative size, tensile strength or types of washers are used.