NSN 4240-01-439-5937, 4240014395937
BREATHING APPARATUS,SELF-CONTAIN

Federal Supply Classification: FSC 4240 - Safety and Rescue Equipment
National Item Identification Number: NIIN 014395937
Codification Country: United States
Item Name Code: INC 21123
Criticality: (Y) This item does not have a nuclear hardened feature but does have other critical feature(s) such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (Y) Information is in the Hazardous Materials Information Resource System (HMIRS).

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DLMS^® Summary

National Stock Number 4240-01-439-5937

National Stock Number (NSN) 4240-01-439-5937, or NIIN 014395937, (breathing apparatus,self-contain) was assigned December 13, 1996 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. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 12, 2015, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.

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 but does have other critical feature(s) such as tolerance, fit restriction or application. Information is in the Hazardous Materials Information Resource System (HMIRS). NSN 4240014395937 does not contain precious metals.

This information was last updated on Jul 01, 2025.

Technical Characteristics

CRITICALITY CODE JUSTIFICATION: (CRTL) SPCL
PART NAME ASSIGNED BY CONTROLLING AGENCY: (CXCY) EMERGENCY ESCAPE BREATHING DEVICE
SPECIAL TEST FEATURES: (SPCL) ITEMS ARE BEING CODED AS CRITICAL TO INSURE SOURCE INSPECTION WILL BE PERFORMED AT THE POINT OF MANUFACTURE, PRIOR TO MATERIAL RECEIPT BY THE US NAVY OR OTHER DOD COMPONENTS. THESE ITEMS ARE PIECE PARTS OR END ITEMS IN SUPPORT OF VITAL MILITARY HARDWARE NECESSARY TO SUSTAIN THE SUCCESSFUL MISSION OF THE SHIPS, SUBMARINES, AND SHORE STATIONS OF THE US NAVY. CRITICAL FEATURES INCLUDING, BUT NOT LIMITED TO, DIMENSIONS, TOLERANCES/CLEARANCES, ELECTRONIC CHARACTERISTICS, AND METALLURGICAL PROPERTIES WILL BESPECIFIED FOR GOVERNMENT Q AR (QUALITY ASSURANCE REPRESENTATIVES) TO INSURE THE HIGHEST POSSIBLE DEGREE OF QUALITY AND RELIABILITY OF THESE PARTS BEING DELIVERED UNDER NAVICP CONTRACTS
SPECIAL FEATURES: (FEAT) QUICKLY DONNED IN SECONDS-SIMPLY UNLATCH THE CASE, PULL OUT THE UNIT, AND INSERT THE MOUTHPIECE AND NOSE CLIP; THE ATTACHED HOOD CAN BE DONNED AT ANY TIME DURING THE ESCAPE; CERTIFIED FOR 15 YEARS SERVICE LIFE; MAINTENANCE FREE FOR 15 YEARS-ONLY VISUAL INSPECTIONS BY SHIPBOARD PERSONNEL ONCE EVERY TWO YEARS; THE SEALED WATERTIGHT CASE PROTECTS AGAINST HARST MARINE CONDITIONS;SUPERIOR PERFORMANCE WITH AUTOMATIC ACTIVATION, COMPLETE PROTECTION FROM LIFE THREATENING ATMOSPHERES AND THE HIGHEST RESPIRATORY PROTECTION FACTOR AVAILABLE; TYPICAL PERFORMANCE DURATION IS BETWEEN 15 AND 32 MINUTES