NSN 4240-01-250-2240, 4240012502240
MASK,AIR LINE

Federal Supply Classification: FSC 4240 - Safety and Rescue Equipment
National Item Identification Number: NIIN 012502240
Codification Country: United States
Item Name Code: INC 17544
Criticality: (C) This item has critical features such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input).
Hazardous Material Indicator Code: (P) 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.

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DLMS^® Summary

National Stock Number 4240-01-250-2240

National Stock Number (NSN) 4240-01-250-2240, or NIIN 012502240, (mask,air line) was assigned February 26, 1987 in the Federal Logistics Information System (FLIS). NIIN 012502240 was cancelled on July 2, 2002, with a cancelled status of "Item is Cancelled WITHOUT Replacement." 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, there are no suppliers that are deemed design controlled or valid supply parts. ISO Group has several sources of supply for 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) 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 has critical features such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). 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 4240012502240 does not contain precious metals.

This information was last updated on Aug 01, 2025.