Model: 251566

Special Features:

Steel, spec data, fed, no. Qq-s-633, fs 1018 to fs 1025 or fsb1112 or fsb 1113; zinc-plated finish; dim. Data, 1-17/64 in. Lg over-all, 7/16 in. Across hex flats, 1/8 in. Lg hex, 7/8 in. From valve end to nearest hex shoulder; barbed type hose connector, barbed type data, 9/64 in. From hex shoulder to nearest edge of barbed hose connector, 0.308 in. Largest diameter of hose connector, 0.187 in. Smallest diameter of hose connector, 17/64 in. Lg hose connector; valve seat end data, 0.339 in. Largest od of taper, 1/8 in. Lg taper, 9/32 in. Lg excluding threaded portion, 7/32 in. From center of inlet hole to valve end, 3/32 in. Diameter inlet hole, external thd data, 7/16 - 20, unf, rh, class 2a thd, 0.509 in. Lg; drain hole data, 0.116 in. Dia, 11/32 in. Lg, 1/8 in. Dia, 3/4 in. Lg

Properties:

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.