Square Washer, Type Square, Dimensional Standards ASTM A582, Material Stainless Steel, Material Grade/Class Grade 2, Finish Plain, For Screw Size 3/8 in, Inside Diameter 0.438 in, Square Width 2 in, Maximum Thickness 0.265 in, System of Measurement Inch, Minimum Thickness 0.235 in, Pack Size Small Pack, Rockwell Hardness B83, Tensile Strength 90,000 psi, Thickness Tolerance +/-0.030 in