Lock Nut, Finish Chrome-Plated, Material Steel, Material Grade/Class Grade 2, Thread Size 3/8 In. -16, Hex Width 9/16 in, Hex Height 15/32 in, Lock Type Nylon Insert, Dimensional Standards B 18.16. 6, Material Quality Standards AISI 1008-1010, System of Measurement Inch, Hex Type Standard Hex, Thread Direction Right Hand, Industry Standards ASME B 18.16. 6, Insert Material Nylon, Pack Size Small Pack, Rockwell Hardness -, Tensile Strength Not Applicable, Thread Fit 2B, Package Quantity 5