Special Features:

Steel sae 1315, cadmium plated an-p-61, 0.625 in. Lg, 0.750 in. W octagon shaped wrenching feature, 9/16-18 nf2 thd on one end

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.