Fits M8 Threaded Rod Bright Zinc Plated (BZP) Heavy Duty 3mm Thick Back Plate Resistance Welded connection nut. M8 Clearance Back Plate Holes - (Slots at 90 degrees to simply fixing) Back Plate Dimensions : 75mm x 25mm Suitable for Static Vertical Loads Only. Load Rating - 250Kg Sold as a pack of 50