The Parts Kit,aircraft Heat Exchange, cataloged under National Stock Number 1660-00-887-6909, 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 Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-00-887-6909 |
| Primary Part Number | 591420-1 |
| Item Name | Parts Kit,aircraft Heat Exchange |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Component Quantity | 7 |
| Unit Package Quantity | 6 |
| 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 |
|---|---|
| 591420-1 | Boeing Distribution Services X, Inc. (USA) |
| 591420-1 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 591420-1 | 5/9 Secondary reference Be Aerospace Consumables Management Dba Consumables Solutions Div Consumables Solutions |
| 591420-1 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| 591420-1 | 5/9 Secondary reference Be Aerospace Consumables Management Dba Aerospace Services Div Consumables Solutions |
NSN 1660-00-887-6909 is a Parts Kit,aircraft Heat Exchange, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-887-6909 has 2 manufacturer part numbers on file: 591420-1 (Boeing Distribution Services X, Inc.), 591420-1 (Honeywell International Inc. Div Aerospace - Torrance).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-623-4409. Verify interchangeability with system specifications before substitution.
Key specifications for 591420-1: Component Quantity: 7; Unit Package Quantity: 6. 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.