The Boot,filter,regulator, cataloged under National Stock Number 1660-01-044-0104, 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-Tucson. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-044-0104 |
| Primary Part Number | 139349-1 |
| Item Name | Boot,filter,regulator |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| General Characteristics Item Description | ETHYLENE PROPYLENE (EMS388),3.590 IN. MAX 3.550 IN. MIN DIA,1.430 IN.MAX 1.400 IN. MIN H IN |
| 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 |
|---|---|
| 139349-1 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 139349-1 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 1660-01-044-0104 is a Boot,filter,regulator, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-044-0104 has 1 manufacturer part number on file: 139349-1 (Honeywell International, Inc Div Aerospace-Tucson).
1 possible match (shared part number, not a government interchangeability claim): 1660-01-669-3863. Verify interchangeability with system specifications before substitution.
Key specifications for 139349-1: General Characteristics Item Description: ETHYLENE PROPYLENE (EMS388),3.590 IN. MAX 3.550 IN. MIN DIA,1.430 IN.MAX 1.400 IN. MIN H IN; End Item Identification: 1660010061601. 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.
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.