Spherical Washer Assembly Bottom Washer Inside Diameter 0.781 in Bottom Washer Outside Diameter 1.625 in Bottom Washer Radius 2.25 in Dimensional Standards TCMAI Finish Plain For Screw Size 3/4 in Material Stainless Steel Material Grade/Class 18-8 Maximum Rotation 3 Degrees Maximum Thickness 0.375 in Minimum Thickness 0.375 in Pack Size Small Pack Rockwell Hardness 27 on 15N Scale Spherical Washer Type Spherical Washer Assembly System of Measurement Inch