Tech manual navair 19-40-523; this valve called fuel drain petcock
An item designed to drain fluids from fuel systems, tanks, filters, or similar items. It has a mounting end, a free flowing end, and a quick-acting nonmetallic sealed closure, usually spring loaded, that holds it in an "off" position. It requires no lubrication other than from the fluid being drained.
Classification: Parts of taps, cocks, valves and similar appliances, nesoi
NSN 5945-01-573-6163
NSN 2925-00-258-9786
NSN 6320-00-779-5923
NSN 5910-01-633-9963
NSN 5998-01-641-1264
NSN 6620-01-104-5758
NSN 5960-01-414-8918
NSN 5930-01-147-9941
NSN 5998-00-654-5278
NSN 5915-01-123-9670
NSN 5895-01-264-5260
NSN 5915-00-011-1612