The Bushing, cataloged under National Stock Number 1660-00-065-1391, 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 Allison Transmission Inc Dba Allison Transmission, Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Bushing |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Allison Transmission Inc Dba Allison Transmission, Inc (CAGE 73342); General Motors Corp (CAGE 24617) |
| Parameter | Value |
|---|---|
| NSN | 1660-00-065-1391 |
| Primary Part Number | 6522421 |
| Item Name | Bushing |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| 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 |
|---|---|
| 6522421 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 6522421 | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 6522421 | 3/9 Design control — primary reference Aeroproducts Opns of Allison Div of General Motors Corp |
| 6522421 | 5/2 Secondary reference U.S. Government activity |
NSN 1660-00-065-1391 is a Bushing, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-065-1391 has 2 manufacturer part numbers on file: 6522421 (Allison Transmission Inc Dba Allison Transmission, Inc), 6522421 (General Motors Corp).
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 1660-00-065-1391 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.