Large O.D. Oversized Washer, Flat Washer Type Oversized, Dimensional Standards ASME B18.21.1, Material Steel, Material Grade/Class Case Hardened, Finish Zinc-Plated, For Screw Size 3/8 in, Inside Diameter 0.41 in, Outside Diameter 1 3/4 in, Maximum Thickness 5/64 in, System of Measurement Inch, Minimum Thickness 3/64 in, Color Silver, Material Quality Standards ASTM F844, Maximum Temperature 302 Degrees F, Minimum Temperature -58 Degrees F, Pack Size Small Pack, Rockwell Hardness Not Rated