NSN 1660-00-822-6512, 1660008226512
Cancelled -> Replaced by 6680006528991

Federal Supply Classification: FSC 1660 - Aircraft Air Conditioning, Heating, and Pressurizing Equipment
National Item Identification Number: NIIN 008226512
Codification Country: United States
Item Name Code: INC 77777
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: We have 3 qualified suppliers

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DLMS^® Summary

National Stock Number 1660-00-822-6512

National Stock Number (NSN) 1660-00-822-6512, or NIIN 008226512, (valve assembly,oxygen) was assigned January 1, 1962 in the Federal Logistics Information System (FLIS). This NSN replaces 2 stock numbers: 6680006528991, 1660007994541.

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 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. 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) 77777. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1660008226512 does not contain precious metals.

This NSN is associated to Schedule B 8803300060: other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof). The Schedule B End Use is listed as parts for military-type goods. NAICS classification category 336413: other aircraft parts and auxiliary equipment manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) MATL: BODY-ALUMINUM ALLOY; FLOW CONTROL DEVICE-STEEL,CORROSION RESISTING,SEAT-ALUMINUM ALLOY; STYLE- STRAIGHT THRU; FLOW CONTROL DEVICE- CONE; CONNECTION TYPE-THREADED EX- TERNAL TUBE,1ST END; THREADED EX- TERNAL PIPE 2ND END; CONNECTION STYLE-FLARED-BOTH ENDS; NOMINAL PIPE SIZE ACCOMMODATED 0.125 IN. 2ND END; NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED 0. 500 IN. 1ST END; THREAD SERIES AND SIZE DESIGNATION-1ST END,UNF 0.500 IN.,20 THREADS PER IN. RIGHT HAND; 2ND END,NPT 0.125 IN.,27 THREADS PER IN.RIGHT HAND; DISK LOADING METHOD- SPRING