Spherical 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 3/4 in Flange Diameter 1 5/8 in System of Measurement Inch Color Black Compatible Washer Manufacturer Part Number 42747 Maximum Rotation 2 Degrees Nut Finish Black Oxide Pack Size Small Pack Rockwell Hardness 85-90 Rockwell on 15N Scale