Jam Nut Hex Type Jam Hex Finish Zinc Plated Material Steel Material Grade/Class Grade A Thread Size 5/16 In.-18 Hex Width 1/2 in Hex Height 3/16 in Manufacturer Location Globally Sourced Dimensional Standards ASME B18.2.2 System of Measurement Inch Thread Direction Right Hand Pack Size Small Pack Rockwell Hardness C32 Thread Type Coarse Package Quantity 100