The Mouthpiece,oxygen, cataloged under National Stock Number 1660-01-249-8928, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-249-8928 |
| Primary Part Number | 1586AS123-1 |
| Item Name | Mouthpiece,oxygen |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| FSC Application Data | EMERGENCY EGRESS DEVICE |
| General Characteristics Item Description | MATL SILICONE,O/A DIMS 2.500 IN.DIA,2.000 IN. LG IN |
| 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 |
|---|---|
| 1586AS123-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1058-89 | 5/1 Secondary reference U.S. Government activity |
| 01-040-006 | 5/9 Secondary reference Under Sea Industries Inc Sub of S C Johnson and Son Inc |
| 410687E | 3/9 Design control — primary reference Sabre Industries Inc |
NSN 1660-01-249-8928 is a Mouthpiece,oxygen, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-249-8928 has 1 manufacturer part number on file: 1586AS123-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 4220-01-256-3635. Verify interchangeability with system specifications before substitution.
Key specifications for 1586AS123-1: FSC Application Data: EMERGENCY EGRESS DEVICE; General Characteristics Item Description: MATL SILICONE,O/A DIMS 2.500 IN.DIA,2.000 IN. LG IN; End Item Identification: SRU-36/P. 2 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 1660-01-249-8928 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.