The Duct and Flange,valve to Turbine, cataloged under National Stock Number 1660-00-888-8395, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. 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 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 | 1660-00-888-8395 |
| Primary Part Number | 556743 |
| Item Name | Duct and Flange,valve to Turbine |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| General Characteristics Item Description | DUCT 1.000 IN. OD 0.878 IN. ID;FLANGE 1.445 IN. SQUARE 0.200 IN. THK,4 MOUNTING HOLES 0.230 IN. DIA;O/A ITEM LG 1.300 IN. IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 556743 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 1660-00-888-8395 is a Duct and Flange,valve to Turbine, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-888-8395 has 1 manufacturer part number on file: 556743 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 5360-01-159-5952. Verify interchangeability with system specifications before substitution.
Key specifications for 556743: General Characteristics Item Description: DUCT 1.000 IN. OD 0.878 IN. ID;FLANGE 1.445 IN. SQUARE 0.200 IN. THK,4 MOUNTING HOLES 0.230 IN. DIA;O/A ITEM LG 1.300 IN. IN; End Item Identification: 1660000339178. 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 1660-00-888-8395 has DEMIL Code Q. 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.