Square Washer, Type Square, Material Steel, Material Grade/Class Grade 2, Finish Galvanized, For Screw Size 3/4 in, Inside Diameter 0.812 in, Square Width 2 in, Maximum Thickness 0.265 in, System of Measurement Inch, Minimum Thickness 0.235 in, Pack Size Small Pack, Resistance Properties , Rockwell Hardness B55, Thickness Tolerance +/-0.030 in