Description Warranty Information Teco Heavy Duty Hardened Flat Washer Black Oxide Finish Case Hardened C1010 Material Material C1010 Steel Finish Black Oxide Type Flat Washer Stud Size 1/2 Inside Diameter (A) 0.531 in Outside Diameter (B) 1.125 in Thickness (C) 0.188 in Teco FLAT WASHER 1/2"