Hex Nut Hex Type Heavy Hex Finish Black Oxide Material Grade/Class Grade 2H Material Steel Thread Size 2 In.-8 Hex Width 3 1/8 in Hex Height 2 1/32 in Material Quality Standards ASTM A194 System of Measurement Inch Thread Direction Right Hand Pack Size Small Pack Removable Yes Rockwell Hardness C24 to C38 Thread Type Coarse/8UN