Flange Nut Material Grade/Class Not Graded Material Steel Finish Black Oxide Thread Size 3/4 In.-10 Hex Width 1 1/4 in Hex Height 1 in Flange Diameter 1 5/8 in System of Measurement Inch Color Black Flange Thickness 0.25 in Hex Type Flange Nut Overall Height 1 in Pack Size Small Pack Rockwell Hardness 85-90 Rockwell on 15N Scale Thread Direction Right Hand