Thumb Nut Head Shape Hex Finish Plain Material Grade/Class 18-8 Material Stainless Steel Thread Size 3/8 In.-16 Overall Height 15/32 in Head Height 7/32 in Base Height 1/4 in Base Diameter 5/8 in Thread Length 15/32 in System of Measurement Inch Thread Direction Right Hand Hex Width 3/4 in Material Quality Standards ASTM 581/582 Pack Size Small Pack Package Quantity 5