Flange Nut Material Grade/Class Not Graded Material Steel Finish Black Oxide Thread Size 3/8 In.-24 Hex Width 11/16 in Hex Height 1/2 in Flange Diameter 7/8 in System of Measurement Inch Color Black Flange Thickness 0.125 in Hex Type Flange Nut Overall Height 1/2 in Pack Size Small Pack Rockwell Hardness 85-90 Rockwell on 15N Scale Thread Direction Right Hand