The Control Unit,oxygen, cataloged under National Stock Number 1660-00-573-2196, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-573-2196 |
| Primary Part Number | 22504-7 |
| Item Name | Control Unit,oxygen |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| Status | ACTIVE |
| General Characteristics Item Description | ELECTRO-PNEUMATIC CONTINUOUS FLOW CONTROL UNIT,2100 PSI MAXIMUM TO INLET OPERATION,UNIT OF CONTROL INSTALLATION PASSENGER OXYGEN SYSTEM,OXYGEN ONLY,APPL BOEING 727 ACFT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 22504-7 | Avox Systems Inc Dba Avox Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 10-60511-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-573-2196 is a Control Unit,oxygen, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-573-2196 has 1 manufacturer part number on file: 22504-7 (Avox Systems Inc Dba Avox Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-612-2470. Verify interchangeability with system specifications before substitution.
Key specifications for 22504-7: General Characteristics Item Description: ELECTRO-PNEUMATIC CONTINUOUS FLOW CONTROL UNIT,2100 PSI MAXIMUM TO INLET OPERATION,UNIT OF CONTROL INSTALLATION PASSENGER OXYGEN SYSTEM,OXYGEN ONLY,APPL BOEING 727 ACFT. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1660-00-573-2196 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.