Extra Thick Oversized Washer, Flat Washer Type Standard, Dimensional Standards TCMAI, Material Steel, Material Grade/Class C1010, Finish Black Oxide, For Screw Size 1 1/4 in, Inside Diameter 1.281 in, Outside Diameter 2 1/2 in, Maximum Thickness 9/32 in, System of Measurement Inch, Minimum Thickness 17/64 in, Color Black, Made in North America Made in North America, Material Quality Standards Not Applicable, Maximum Temperature 400 Degrees F, Pack Size Bulk Pack, Thickness Tolerance +/-1/64 in