Jam Nut, Hex Type Jam Hex, Finish Zinc Yellow, Material Grade/Class Grade A, Material Steel, Thread Size 1/2 In. -20, Hex Width 3/4 in, Hex Height 21/64 in, Manufacturer Location Globally Sourced, Dimensional Standards ASME B 18.2. 2, Material Quality Standards SAE J995, System of Measurement Inch, Thread Direction Right Hand, Color Yellow, Industry Standards ASME B 18.2. 2, Made in North America No, Pack Size Small Pack, REACH Compliant Yes, Removable Yes, Rockwell Hardness C32, RoHS Compliant Yes