Countersunk Washer, Material Grade/Class Not Graded, Material Steel, Finish Nickel Plated, For Screw Size #12, Maximum Inside Diameter 0.289 in, Outside Diameter 21/32 in, Countersink Angle 82 Degrees , Overall Height 0.125 in, System of Measurement Inch, For Use With Flat and Oval Head Countersunk Screws, Pack Size Small Pack, Rockwell Hardness B70, Package Quantity 100