Hex Nut, Hex Type Standard Hex, Finish Armor Coat, Material Grade/Class Grade 8, Material Steel, Thread Size 1/2 In.-13, Hex Width 3/4 in, Hex Height 7/16 in, Manufacturer Location Made in USA*, Dimensional Standards ASME B18.2.2, ELV Compliant, WEEE, Material Quality Standards ASTM A194/A194M-2020a, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Removable Yes, Resistance Properties , Rust , Rockwell Hardness C33 to C39