Steel,zinc-plated finish,dim data,1-1/2 in. porm .010 lg over-all,7/16 in. porm .010 across hex flats,17/64 in. porm .010 lg hex,31/32 in. porm .010 from valve end to nearest hex shoulder,barbed type hose connector,barbed type data,9/64 in. porm .010 from hex shoulder to nearest edge to barbed hose connector,0.303 in. to 0.313 in. largest dia of hose connector,5/32 in. porm .010 in. smallest dia of hose connector,17/64 in. porm .010 lg hose connector,valve seat end data,0.271 to 0.281 in. largest od of taper,1/8 in. porm .010 lg of taper,9/32 in. porm .010 lg excluding threaded portion,15/64 in. porm .010 in. from center of inlet hose to valve end,3/32 in. porm .010 in. dia inlet hole,external thd data,3/8-24,unf or nf,rh,class 2a thd or class 2 fit,1/2 in. lg,drain hole data,1/8 in. porm .010 dia,13/16 in. porm .010 in. lg,0.111 in. to 0.121 in. dia,1-5/16 in. porm .010 lg special features

A metallic, threaded, screw-shaped item used in hydraulic brake cylinders, hydraulic power units, missile launching hydraulic systems, and the like, for the purpose of providing a means of releasing air form and/or flushing a hydraulic system. It may be furnished with or without a dust cap. Excludes:spring loaded or automatic type air pressure relief valves, and bolt, fluid passage.