Spherical Washer, Low Carbon Steel, Black Oxide Finish, Fits Bolt Sizes 5/8 In, Inside Dia 21/32 In, Outside Dia 1 3/8 In, Thickness 5/16 In, Thickness Tolerance +/-0.010 In, Radius 1 3/4 In, Rockwell Hardness B49, For Use With Screws and Studs, Includes 1 Male Washers and 1 Female Washers Features Finish: black oxide Includes: 1 Male Washers and 1 Female Washers Item: Spherical Washer Material: Low carbon steel Outside Dia.: 1-3/8" Fits Bolt Sizes: 5/8" Thickness: 5/16" Rockwell Hardness: B49 Thickness Tolerance: +/-0.010" Female I.D.: 11/16" Male I.D.: 21/32" Radius: 1-3/4"

Spherical Washer, Low Carbon Steel, Black Oxide Finish, Fits Bolt Sizes 5/8 In, Inside Dia 21/32 In, Outside Dia 1 3/8 In, Thickness 5/16 In, Thickness Tolerance +/-0.010 In, Radius 1 3/4 In, Rockwell Hardness B49, For Use With Screws and Studs, Includes 1 Male Washers and 1 Female Washers Features Finish: black oxide Includes: 1 Male Washers and 1 Female Washers Item: Spherical Washer Material: Low carbon steel Outside Dia.: 1-3/8" Fits Bolt Sizes: 5/8" Thickness: 5/16" Ro