Hex Standoff Thread Size 1/4 In.-20 Standoff Thread Gender Male-Female Body Length 1/4 in Thread Length 1/2 in Body Thread Length 3/40 in Hex Width 1/2 in Square Size Not Applicable Outside Diameter 1/2 in Shape Hex Material Brass Finish Zinc Plated Pack Size Small Pack System of Measurement Inch Color Silver Stud Thread Length 1/2 in Material Quality Standards ASTM B16 Hex Width Tolerance +/-0.006 in