Vent cap, pressure relief, 2 inch npt; spring loaded emergency vent option 321; units are factory calibrated to open at 8 oz of internal tank pressure.
No other part numbers with same form, fit, and function found.
A spring loaded device equipped with automatic pressure and vacuum relief valves to relieve drum structure of excessive vapor pressure build-ups and provide for vacuum relief to facilitate liquid flow. It also serves as a filling unit with removable cap with chain attachment.
NSN 5915-00-883-4374
NSN 6130-01-421-5400
NSN 5920-01-516-3847
NSN 5998-01-322-7979
NSN 5990-00-110-1153
NSN 5990-01-413-2405
NSN 5910-01-510-6480
NSN 6685-01-432-9396
NSN 5855-00-185-1560
NSN 5930-01-191-0866
NSN 5895-00-038-0847
NSN 5960-01-563-0020