Hex Nut Full Low Carbon Steel Finish Zinc Grade 8 Property Class 8 Thread Size 1/4-20 1/4-20 Thread Type UNC Thread Direction Right Hand Width 7/16 In. Height 7/32 In. Rockwell Hardness C24 to C32 Application General Purpose Meets/Exceeds ASME/ANSI B18.2.2 1987 (R1999) SAE J995 Package Quantity 4000