Cap Nut, Material Grade/Class 316L, Material Stainless Steel, Finish Plain, Thread Size 5/16 In.-18, Overall Height 0.531 in, Hex Width 1/2 in, Tensile Strength 75,000 psi, Dimensional Standards SAE J483, Material Quality Standards AISI Grade 316, ASTM, System of Measurement Inch, Pack Size Small Pack, Resistance Properties Corrosion Resistant, Rockwell Hardness B80/90, Thread Direction Right Hand