The Flapper Assembly, cataloged under National Stock Number 1660-00-006-1068, 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 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-00-006-1068 |
| Item Name | Flapper Assembly |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| FSC Application Data | HEAT AND VENT PRESSURIZATION SYSTEM,ACFT |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-250/5,ALLOY ALCLAD 2024-0,3.780 IN. WORKING LGAT 45.0,C/O PLATE P/N 36-7238-2,SEAL P/N 36-7238-3 IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 36-7238-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-006-1068 is a Flapper Assembly, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-005-7045. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-00-006-1068: FSC Application Data: HEAT AND VENT PRESSURIZATION SYSTEM,ACFT; General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-250/5,ALLOY ALCLAD 2024-0,3.780 IN. WORKING LGAT 45.0,C/O PLATE P/N 36-7238-2,SEAL P/N 36-7238-3 IN. 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.
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.