Lock Nut Finish Zinc Yellow Material Steel Material Grade/Class Grade 8 Thread Size 1/4 In.-28 Hex Width 7/16 in Hex Height 15/64 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