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 5985-01-263-8686
NSN 6645-01-247-2201
NSN 5999-01-634-0576
NSN 5920-00-592-7598
NSN 7035-00-574-4223
NSN 6105-01-089-1325
NSN 6135-00-851-8575
NSN 6150-00-675-1307
NSN 5835-00-912-5656
NSN 6610-00-008-0216
NSN 6130-00-065-7006
NSN 6610-01-224-6396