Cap Nut, Profile High Crown, Material Grade/Class 12L14, Material Steel, Finish Plain, Thread Size 5/16 In. -18, Overall Height 0.688 in, Hex Width 1/2 in, Tensile Strength 70, 000 psi, Dimensional Standards SAE J483, Material Quality Standards ASTM 12L14, System of Measurement Inch, Color Steel, Lock Type Non-Locking, Pack Size Small Pack, Rockwell Hardness B80 to B90, Thread Direction Right Hand, Package Quantity 10. This item has been restricted from sale in the following state (s): []