SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.22.1 Type A Narrow, SAE Standard, Material Steel, Material Grade/Class Grade 2, Finish Plain, For Screw Size 7/8 in, Inside Diameter 0.938 in, Outside Diameter 1 5/8 in, Maximum Thickness 5/32 in, System of Measurement Inch, Minimum Thickness 5/32 in, Inside Diameter Tolerance 0.939 to 0.965 in, Outside Diameter Tolerance 1.614 in to 1.644 in, Pack Size Small Pack, Rockwell Hardness 38HRC, Thickness Tolerance 0.144 to 0.168 in