Hex Nut Hex Type Standard Hex Finish Black Oxide Material Grade/Class Grade 2H Material Steel Thread Size 1/4 In.-20 Hex Width 7/16 in Hex Height 7/32 in Dimensional Standards ASME B18.2.2 System of Measurement Inch Thread Direction Right Hand Pack Size Bulk Pack Removable Yes Rockwell Hardness C24 to C38 Thread Type Coarse Package Quantity 3600