The Coalescer Assy,water Separator, cataloged under National Stock Number 1660-00-021-5455, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 1660-00-021-5455 |
| Primary Part Number | 180849-6 |
| Item Name | Coalescer Assy,water Separator |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| General Characteristics Item Description | DACRON PER EMS 386,9.660 IN. MIN 9.720 IN. MAX OD,4.950 IN. MIN 5.010 IN. MAX ID,16.260 IN. MIN 16.320 IN. MAX LG IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1660-00-021-5455 is a Coalescer Assy,water Separator, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-021-5455 has 2 manufacturer part numbers on file: 180849-6 (Honeywell International Inc. Div Aerospace - Torrance), 180849-6 (Aero International, Llc Dba Ams Engineered Solutions).
1 possible match (shared part number, not a government interchangeability claim): 5955-01-444-6934. Verify interchangeability with system specifications before substitution.
Key specifications for 180849-6: General Characteristics Item Description: DACRON PER EMS 386,9.660 IN. MIN 9.720 IN. MAX OD,4.950 IN. MIN 5.010 IN. MAX ID,16.260 IN. MIN 16.320 IN. MAX LG 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.
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.