The Diffuser,air,aircraft Heating an, cataloged under National Stock Number 1660-00-446-2188, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-446-2188 |
| Primary Part Number | 203012 |
| Item Name | Diffuser,air,aircraft Heating an |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY; 2.080 IN. MINIMUM AND 2.090 IN. MAXIMUM BODY WIDTH; 7.842 IN. NOMINAL OVERALL DIAMETER 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 |
|---|---|
| 203012 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 203012 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
NSN 1660-00-446-2188 is a Diffuser,air,aircraft Heating an, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-446-2188 has 1 manufacturer part number on file: 203012 (Honeywell International Inc. Div Aerospace - Torrance).
3 possible matches (shared part number, not a government interchangeability claim): 6130-01-237-3295, 5330-01-510-8404, 4820-01-531-9578. Verify interchangeability with system specifications before substitution.
Key specifications for 203012: General Characteristics Item Description: ALUMINUM ALLOY; 2.080 IN. MINIMUM AND 2.090 IN. MAXIMUM BODY WIDTH; 7.842 IN. NOMINAL OVERALL DIAMETER 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 1660-00-446-2188 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.