Description Steel back-up washer for use with 3/16" diameter rivets Spec MFG Item No: 512-6666852Material: SteelColor/Finish: PlainWidth: 0.50in [12.7mm]Height: 0.04in [1.0mm]Depth: 0.50in [12.7mm]Weight: 0.01Lbs [0.0kg]Country of Origin: United States Documents