M16x50x50x3mm Square Washer with Round Hole BS3410 Bzp

This is a plain heavy duty square flat washers with a round fixing hole. The washers are BS3410 standard which are used to spead 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 are bright zinc plated fasteners which is a preventative measure from corrosion.  Avoiding breaking into the Bzp plating to avoid corrosion developing faster.  Also bear in mind using different materials can cause fusing through corrosion especially in damp conditions when mixed with aluminium or stainless steel materials.

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.