Swivel Flange Nut Material Grade/Class Not Graded Material Steel Finish Black Oxide Thread Size 1 In.-8 Hex Width 1 5/8 in Hex Height 49/64 in Flange Diameter 2 in System of Measurement Inch Color Black Flange Thickness 0.469 in Hex Type Swivel Flange Nut Overall Height 1 15/64 in Pack Size Small Pack Rockwell Hardness Nut - 25 Rokwell Collar - 85-90 Rockwell on 15N Scale Thread Direction Right Hand