Spherical Flange Nut Material Grade/Class 18-8 Material Stainless Steel Finish Black Oxide Thread Size 3/8 In.-16 Hex Width 11/16 in Hex Height 3/8 in Flange Diameter 7/8 in System of Measurement Inch Compatible Washer Manufacturer Part Number 47742 Maximum Rotation 3 Degrees Nut Finish Plain Pack Size Small Pack Rockwell Hardness 27 Rockwell