Flat Washer, Flat Washer Type Standard, Dimensional Standards ANSI B18.22.1, Material PEEK, Material Grade/Class Not Applicable, Finish Plain, For Screw Size 1/2 in, Inside Diameter 0.531 in, Outside Diameter 1 1/16 in, Maximum Thickness 3/32 in, System of Measurement Inch, Minimum Thickness 3/32 in, Color Brown, Maximum Temperature 500 Degrees F, Minimum Temperature -50 Degrees F, Pack Size Small Pack, Rockwell Hardness D87.5, Thickness Tolerance +/-0.015 in, Package Quantity 10