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 6685-00-049-4683
NSN 5930-00-925-8246
NSN 2925-01-123-5856
NSN 5910-00-280-5556
NSN 5999-01-032-7010
NSN 2925-01-053-0886
NSN 5960-01-553-4557
NSN 5985-01-418-7613
NSN 5905-01-268-2246
NSN 6320-01-415-0953
NSN 6135-01-119-0720
NSN 6130-00-285-8119