Flange Nut, Material Grade/Class Not Graded, Material Steel, Finish Black Oxide, Thread Size M8-1.25, Hex Width 13 mm, Hex Height 10 mm, Flange Diameter 19 mm, System of Measurement Metric, Color Black, Flange Thickness 2.5 mm, Hex Type Flange Nut, Overall Height 10 mm, Pack Size Small Pack, Rockwell Hardness 85-90 Rockwell on 15N Scale, Thread Direction Right Hand