Hex Nut Hex Type Heavy Hex Finish Black Oxide Material Grade/Class Grade C Material Steel Thread Size 3/4 In.-10 Hex Width 1 1/4 in Hex Height 3/4 in Material Quality Standards ASTM 563 System of Measurement Inch Thread Direction Right Hand Pack Size Small Pack Removable Yes Rockwell Hardness B78 to C38 Thread Type Coarse Package Quantity 25