Flange Nut Material Grade/Class Not Graded Material Steel Finish Black Oxide Thread Size M6-1 Hex Width 10 mm Hex Height 8 mm Flange Diameter 16 mm System of Measurement Metric Color Black Flange Thickness 2 mm Hex Type Flange Nut Overall Height 8 mm Pack Size Small Pack Rockwell Hardness 85-90 Rockwell on 15N Scale Thread Direction Right Hand