Flat Washer, Flat Washer Type Oversized, Dimensional Standards ASME B18.22.1, Material Steel, Material Grade/Class Class 8.8, Finish Black Oxide, For Screw Size 1 1/4 in, Inside Diameter 1.281 in, Outside Diameter 2 1/2 in, Maximum Thickness 0.281 in, System of Measurement Inch, Minimum Thickness 0.281 in, Color Clear, Inside Diameter Tolerance 1.274-1.311, Made in North America No, Manufacturer Location Globally Sourced, Material Quality Standards ASTM A-325, Maximum Temperature 350 Degrees C