The Guide,cable,mask, cataloged under National Stock Number 1660-01-266-6975, 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 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 | 1660-01-266-6975 |
| Primary Part Number | 00-639 |
| Item Name | Guide,cable,mask |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| Status | ACTIVE |
| FSC Application Data | LIFE SUPPORT SYSTEM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 00-639 PRIMARY | Avox Systems Inc Dba Avox Systems Inc (USA) |
NSN 1660-01-266-6975 is a Guide,cable,mask, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-266-6975 has 1 manufacturer part number on file: 00-639 (Avox Systems Inc Dba Avox Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-679-7980. Verify interchangeability with system specifications before substitution.
Key specifications for 00-639: FSC Application Data: LIFE SUPPORT SYSTEM; End Item Identification: QUICK DON MASK 358-1506V V. 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.
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.