Swivel Flange Nut Material Grade/Class Not Graded Material Steel Finish Black Oxide Thread Size 5/8 In.-11 Hex Width 1 1/16 in Hex Height 21/32 in Flange Diameter 1 3/8 in System of Measurement Inch Color Black Flange Thickness 0.25 in Hex Type Swivel Flange Nut Overall Height 29/32 in Pack Size Small Pack Rockwell Hardness Nut - 25 Rokwell Collar - 85-90 Rockwell on 15N Scale Thread Direction Right Hand