National Stock Number
4240-01-054-4273
National Stock Number (NSN) 4240-01-054-4273, or NIIN 010544273, (breathing apparatus,self-contain) was assigned January 20, 1978 in the Federal Logistics Information System (FLIS). 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 02, 1991, this NSN's acquisition method was noted as: Not established. Not established.
This NSN is assigned to Item Name Code (INC) 21123. [A PORTABLE RESPIRATORY PROTECTIVE DEVICE, WHICH SUPPLIES RESPIRABLE AIR TO THE WEARER FROM SELF-CONTAINED AIR CYCLINDER(S) WITHOUT RECOURSE TO ATMOSPHERIC AIR SUPPLY. IT MAY HAVE BREATHING BAGS. EXCLUDES:ITEMS WHICH USE CHEMICALS TO GENERATE OXYGEN, AND RESPIRATOR OUTFIT.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. 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 4240010544273 contains an unknown precious metal.
This information was last updated on Jun 01, 2025.