Standoff Thread Size 5/16 In.-18 Standoff Thread Gender Female-Female Cap Head Height Not Applicable Cap Head Diameter Not Applicable Overall Length 1/4 in Body Length 1/4 in Thread Length 1/4 in Body Thread Length 1/4 in Hex Width Not Applicable Square Size Not Applicable Outside Diameter 1 1/2 in Shape Round Material Aluminum Finish Black Anodized Pack Size Small Pack System of Measurement Inch Color Black Overall Length Tolerance +/-0.010 in