National Stock Number
2520-01-237-3542
National Stock Number (NSN) 2520-01-237-3542, or NIIN 012373542, (breather) was assigned July 30, 1986 in the Federal Logistics Information System (FLIS). NIIN 012373542 was cancelled on September 2, 2000, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 2940121860417. This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 11034. [A MECHANICAL DEVICE DESIGNED TO PERMIT A FREE FLOW OF AIR INTO AND OUT OF AN ENCLOSURE, USUALLY USED ON ENGINE CRANKCASE, VEHICULAR DIFFERENTIALS AND TRANSMISSIONS, PUMPS, COMPRESSORS, AND THE LIKE. SEE ALSO CAP, VENT, FUEL STORAGE TANK. EXCLUDES VENTALATOR (AS MODIFIED).]. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 2520012373542 does not contain precious metals.
This information was last updated on Jul 01, 2025.