National Stock Number
4220-01-501-7977
National Stock Number (NSN) 4220-01-501-7977, or NIIN 015017977, (inflator,diver''s b uoyancy compensator) was assigned October 16, 2002 in the Federal Logistics Information System (FLIS). NIIN 015017977 was cancelled on August 24, 2011, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 53371. [AN ITEM WHICH IS COMPOSED OF A MOUTHPIECE EQUIPPED WITH A CHECK VALVE AND A PUSH BUTTON FOR DEFLATION AND ORAL INFLATION OF A COMPENSATOR, BUOYANCY, DIVER'S. THIS SYSTEM (MOUTHPIECE ASSEMBLY) WORKS IN CONJUNCTION WITH AN INHALATION-EXHALATION DIAPHRAGM WHICH ALLOWS THE DIVER'S BREATHING WITH THE AIR VOLUME CONTAINED IN THE COMPENSATOR. THE ITEM IS ALSO PROVIDED WITH ANOTHER INFLATING DEVICE USING THE AIR CONTAINED IN THE DIVER'S CYLINDER(S). EXCLUDES:REGULATOR (1), AIR PRESSURE, DEMAND AND VALVE (1), PNEUMATIC INFLATOR.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4220015017977 does not contain precious metals.
This information was last updated on Jun 01, 2025.