Lock Nut Finish Zinc Yellow Material Steel Material Grade/Class Grade 8 Thread Size 5/16 In.-24 Hex Width 1/2 in Hex Height 1/4 in Lock Type Nylon Insert Dimensional Standards ASME B18.16.6 System of Measurement Inch Hex Type Standard Hex Thread Direction Right Hand Pack Size Small Pack Rockwell Hardness HRC24 - C32 Package Quantity 100