No. 7 standard stopper
No other part numbers with same form, fit, and function found.
A round bottom vessel with a long wide neck used for determining the amount of nitrogen in substances.
NSN 2925-01-290-4562
NSN 5855-01-295-2313
NSN 5855-00-150-1820
NSN 6650-01-513-2644
NSN 6220-01-016-4888
NSN 6685-01-287-8062
NSN 5915-01-414-9915
NSN 5895-01-294-7704
NSN 6650-01-596-8627
NSN 6130-00-757-7389
NSN 5930-01-350-4171
NSN 5835-01-615-4766