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 6110-01-473-9550
NSN 5999-01-556-6889
NSN 6220-01-157-4937
NSN 6105-00-253-9279
NSN 5996-00-632-0117
NSN 5930-01-593-1962
NSN 5855-00-472-2055
NSN 5990-01-316-9477
NSN 6610-00-597-5671
NSN 6150-01-106-0989
NSN 6150-00-974-9261
NSN 6650-01-109-4735