The Heat Exchanger,air to Air,aircra, cataloged under National Stock Number 1660-01-329-3237, 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 Wellman Group. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Heat Exchanger,air to Air,aircra |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Wellman Group (CAGE K7018) |
| Parameter | Value |
|---|---|
| NSN | 1660-01-329-3237 |
| Primary Part Number | D5040-535-02 |
| Item Name | Heat Exchanger,air to Air,aircra |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Wellman Group |
| 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 |
|---|---|
| D5040-535-02 | Wellman Group (GBR) |
| Reference | Meaning |
|---|---|
| D5040-535-02 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-01-329-3237 is a Heat Exchanger,air to Air,aircra, manufactured by Wellman Group, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-329-3237 has 1 manufacturer part number on file: D5040-535-02 (Wellman Group).
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 1660-01-329-3237 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.