The end item is forrestal class cv
An item designed to be attached to the liquid chamber of an indicator, sight, liquid permitting the visual examination of the amount of liquid in a reservoir, pipe or the like.
Classification: Instruments and apparatus for measuring or checking the flow or level of liquids, nesoi
NSN 6110-01-340-6693
NSN 6135-01-633-8502
NSN 4140-00-045-8117
NSN 5975-00-847-1244
NSN 6685-00-859-1362
NSN 6685-01-323-1975
NSN 5965-01-444-1322
NSN 5835-01-495-0595
NSN 5996-01-394-5768
NSN 4140-01-243-0608
NSN 6110-00-153-0936
NSN 6620-01-494-9858