The Valve Vent, cataloged under National Stock Number 1660-00-703-8905, 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 Mine Safety Appliances Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Valve Vent |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Mine Safety Appliances Company (CAGE 55799) |
| Parameter | Value |
|---|---|
| NSN | 1660-00-703-8905 |
| Primary Part Number | 81053 |
| Item Name | Valve Vent |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Mine Safety Appliances Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 81053 PRIMARY | Mine Safety Appliances Company (USA) |
| Reference | Meaning |
|---|---|
| 8148650 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 1660-00-703-8905 is a Valve Vent, manufactured by Mine Safety Appliances Company, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-703-8905 has 1 manufacturer part number on file: 81053 (Mine Safety Appliances Company).
1 possible match (shared part number, not a government interchangeability claim): 6240-01-329-1750. Verify interchangeability with system specifications before substitution.
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 1660-00-703-8905 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.