Spherical Washer Bottom Washer Inside Diameter 28 mm Bottom Washer Outside Diameter 44 mm Bottom Washer Radius 32 mm Finish Black Oxide For Screw Size M24 Material Steel Maximum Thickness 15.2 mm Minimum Thickness 15.2 mm Pack Size Small Pack Rockwell Hardness C40 Spherical Washer Type Spherical Washer Assembly System of Measurement Metric Top Washer Inside Diameter 25 mm Top Washer Outside Diameter 44 mm 1 Pair