Hex Nut Hex Type Standard Hex Finish Armor Coat Material Grade/Class Grade 8 Material Steel Thread Size 5/16 In.-18 Hex Width 1/2 in Hex Height 17/64 in Manufacturer Location Globally Sourced 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 Corrosion Resistant Rust Resistant Rockwell Hardness C33 to C39