Cap Nut Material Grade/Class Not Graded Material Brass Finish Plain Thread Size 5/16 In.-18 Overall Height 0.438 in Hex Width 9/16 in Tensile Strength 55 000 psi Material Quality Standards ASTM B16 System of Measurement Inch Pack Size Small Pack Removable Yes Resistance Properties Corrosion Resistant Nonmagnetic Thread Direction Right Hand Package Quantity 25