Swivel Flange Nut Material Grade/Class Not Graded Material Steel Finish Black Oxide Thread Size 3/8 In.-16 Hex Width 11/16 in Hex Height 3/8 in Flange Diameter 7/8 in System of Measurement Inch Color Black Flange Thickness 0.156 in Hex Type Swivel Flange Nut Overall Height 17/32 in Pack Size Small Pack Rockwell Hardness Nut - 25 Rokwell Collar - 85-90 Rockwell on 15N Scale Thread Direction Right Hand