Flange Nut, Material Grade/Class Not Graded, Material Steel, Finish Black Oxide, Thread Size M12-1.75, Hex Width 19 mm, Hex Height 17 mm, Flange Diameter 27 mm, System of Measurement Metric, Color Black, Flange Thickness 4 mm, Hex Type Flange Nut, Overall Height 17 mm, Pack Size Small Pack, Rockwell Hardness 85-90 Rockwell on 15N Scale, Thread Direction Right Hand