Cap Nut, Profile High Crown Flattened Head, Material Grade/Class Not Graded, Material Aluminum, Finish Plain, Thread Size 3/8 In.-16, Overall Height 0.781 in, Hex Width 9/16 in, System of Measurement Inch, Color Silver, Pack Size Small Pack, Removable Yes, Rockwell Hardness B85, Thread Direction Right Hand, Thread Fit 2B