Flange Nut Material Grade/Class 18-8 Material Stainless Steel Finish Plain Thread Size 5/16 In.-18 Hex Width 9/16 in Hex Height 1/4 in Flange Diameter 3/4 in System of Measurement Inch Flange Thickness 0.125 in Hex Type Flange Nut Overall Height 3/8 in Pack Size Small Pack Rockwell Hardness 27 Rockwell Thread Direction Right Hand