Hex Nut, Hex Type Standard Hex, Finish Zinc Yellow, Material Grade/Class Grade 8, Material Steel, Thread Size 5/8 In.-11, Hex Width 15/16 in, Hex Height 35/64 in, Manufacturer Location Made in USA*, Dimensional Standards ASME B18.2.2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Bulk Pack, Rockwell Hardness C33 to C39, Thread Type UNC, Package Quantity 300