The Hose Assembly,air Duct, cataloged under National Stock Number 4720-01-593-2371, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-593-2371 |
| Primary Part Number | A1-43998D |
| Item Name | Hose Assembly,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot |
| Status | ACTIVE |
| 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 |
|---|---|
| A1-43998D PRIMARY | Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot (USA) |
| Reference | Meaning |
|---|---|
| 21500 | 5/9 Secondary reference Mark G. Miller, Inc Dba Select Engineering Services |
NSN 4720-01-593-2371 is a Hose Assembly,air Duct, manufactured by Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-593-2371 has 1 manufacturer part number on file: A1-43998D (Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-593-9475. Verify interchangeability with system specifications before substitution.
Key specifications for A1-43998D: Part Name Assigned by Controlling Agency: EXHAUST DUCT; End Item Identification: AN/TPS75. 0 specifications are 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.