National Stock Number
4240-00-275-3178
National Stock Number (NSN) 4240-00-275-3178, or NIIN 002753178, (mask,air line) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers associated with this NSN. 2 of those 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) 17544. [AN INDIVIDUAL RESPIRATORY PROTECTIVE DEVICE CONSISTING OF A FACEPIECE FLEXIBLE BREATHING TUBE, AIR REGULATING VALVE, AND A QUICK RELEASE HOSE COUPLING. THE DEVICE MAY ALSO INCLUDE AN AIR FILTER FOR REMOVING FOREIGN PARTICLES AND ODORS FROM THE AIR SUPPLY LINE, AN ADJUSTABLE WAIST BELT, AND AN AIR HOSE WITH FITTINGS FOR CONNECTING THE DEVICE TO A SUPPLY OF COMPRESSED AIR. A BRACKET IS USUALLY PROVIDED FOR ATTACHING THE REGULATING VALVE TO THE BELT. THIS DEVICE IS DESIGNED TO SUPPLY FRESH AIR TO THE WEARER WHILE IN DUST LADEN AND CONTAMINATED AREAS. EXCLUDES:OXYGEN BREATHING APPARATUS. EXCLUDES:MASK, GAS; MASK, OXYGEN AND RESPIRATOR, AIR FILTERING.]. 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 4240002753178 does not contain precious metals.
This information was last updated on Jul 01, 2025.