Forgefix hexagon nut washer zp forgefix nw6b these hexagon nuts and washers are bright zinc plated for increased corrosion resistance the hexagonal shape of the nut is designed to be driven by a wrench spanner and provides excellent torque the washer distributes the load of a the nut and helps to reduce vibration zinc coatings prevent oxidation of the protected metal to create a longer lasting finish it does this by forming a barrier and by acting as a sacrificial anode if this barrie