The Plug,defogger Valve, cataloged under National Stock Number 1660-00-522-5927, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-522-5927 |
| Primary Part Number | 508902 |
| Item Name | Plug,defogger Valve |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| General Characteristics Item Description | CRES;0.300 IN. DIA;0.270 IN. LG;0.193 IN. DIA HOLE THRU;0.070 IN. DIA CROSS HOLE 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 |
|---|---|
| 508902 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 1660-00-522-5927 is a Plug,defogger Valve, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-522-5927 has 1 manufacturer part number on file: 508902 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 508902: General Characteristics Item Description: CRES;0.300 IN. DIA;0.270 IN. LG;0.193 IN. DIA HOLE THRU;0.070 IN. DIA CROSS HOLE IN. 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 1660-00-522-5927 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.