Romak FST084 M12 Galvanized Square Washer is used to minimize the damage to the surface of the object when tightening the nut. The square plate creates a good friction connection with the bolt and evenly distribute the load. Fit for M12 thread. Galvanized finish to minimise corrosion. Ideal for use in heavy duty industrial applications such as timber construction framing or automotive roof top racking. It is commonly used with an anchor bolt. Specification: hole size: M12, finish / colour: galvanized, overall length: 50 mm, overall width: 50 mm, thickness: 3 mm, system of units: metric. Comes in a pack of 100 pieces.