1/2" Female NPT x 1/2" Body Industrial Style Plug Brand new steel 1/2" female NPT x 1/2" body air compressor plug for industrial style quick release couplers. This is a top-quality plug constructed from steel so it will last longer than the cheaper plugs made from brass. This plug has 1/2" female NPT threads and is compatible with 1/2" body industrial style couplers and Milton G style couplers. Please see below for more details and specifications. Specifications: 1/2" Female NPT Threads (Measures 3/4" wide on a ruler) 1/2" Body 1/2" Basic Flow Size Style: Industrial (Also compatible with Milton G-Style couplers) Material: Steel Overall Diameter: 1.13" Length: 2.39" This listing is for a single plug.