The Hose,air Duct, cataloged under National Stock Number 4720-00-032-1747, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 7 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4720-00-032-1747 |
| Primary Part Number | 128SCEC615-1 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Connection Type | PLAIN BOTH ENDS |
| Style Designator | SLEEVE SECTION |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 1.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 4.250 INCHES NOMINAL FIRST END IN |
| Material | RUBBER SYNTHETIC SINGLE PLY |
| 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 |
|---|---|
| 128SCEC615-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| AD-1104 | Hbd Industries, Inc Div Hbd/thermoid Inc (USA) |
| Reference | Meaning |
|---|---|
| 128SCEC615-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 128SCEC615 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4720-00-032-1747 is a Hose,air Duct, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-032-1747 has 2 manufacturer part numbers on file: 128SCEC615-1 (Northrop Grumman Systems Corporation), AD-1104 (Hbd Industries, Inc Div Hbd/thermoid Inc).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-539-5560. Verify interchangeability with system specifications before substitution.
Key specifications for 128SCEC615-1: Connection Type: PLAIN BOTH ENDS; Style Designator: SLEEVE SECTION; Cross-Sectional Shape Style: ROUND; Operating Pressure: 1.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS. 7 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.