The Mask,oxygen, cataloged under National Stock Number 1660-00-809-0391, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-809-0391 |
| Item Name | Mask,oxygen |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Harness | NOT INCLUDED |
| Design Type | NOSE |
| Mask Size Designation | SMALL |
| Microphone | NOT INCLUDED |
| Oxygen System Type | CONSTANT FLOW |
| Accessory Components and Quantity | CLAMP,HOSE 1,CONNECTOR,OXYGEN MASK HOSE 1,INSERT,PHENOLIC 1 |
| Intake Tube Length | 12.500 INCHES MINIMUM AND 14.500 INCHES MAXIMUM IN |
| Microphone Pocket | INCLUDED |
| Intake Tube Corrugated Feature | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 16600V1-002-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-809-0391 is a Mask,oxygen, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-00-809-0391: Harness: NOT INCLUDED; Design Type: NOSE; Mask Size Designation: SMALL; Microphone: NOT INCLUDED. 9 specifications are 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 1660-00-809-0391 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.