The Hose,air Duct, cataloged under National Stock Number 4720-01-170-4991, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Bae Systems Hagglunds Aktiebolag. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 — Hose and Flexible Tubing (FSG 47) |
| Manufacturers | Bae Systems Hagglunds Aktiebolag (CAGE AC90N) |
| Parameter | Value |
|---|---|
| NSN | 4720-01-170-4991 |
| Primary Part Number | 1865 2395-252 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Bae Systems Hagglunds Aktiebolag |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 1865 2395-252 | Bae Systems Hagglunds Aktiebolag (SWE) |
| Reference | Meaning |
|---|---|
| 18652395-152 | 5/9 Secondary reference Bae Systems Hagglunds Ab |
| 90322-991 | 5/9 Secondary reference Bae Systems Hagglunds Ab |
| 1865 2395-252 | 5/9 Secondary reference Bae Systems Hagglunds Ab |
| 90322-991 | 3/9 Design control — primary reference U.s. Defense Services, Inc. Dba Usds |
| 18978 | 5/9 Secondary reference Ansell Protective Solutions Ab |
| 455-0381 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4720-01-170-4991 is a Hose,air Duct, manufactured by Bae Systems Hagglunds Aktiebolag, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-170-4991 has 1 manufacturer part number on file: 1865 2395-252 (Bae Systems Hagglunds Aktiebolag).
2 possible matches (shared part number, not a government interchangeability claim): 5136-01-647-3979, 6150-01-657-0249. Verify interchangeability with system specifications before substitution.
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.