The Coupling Assembly,tube,flexible, cataloged under National Stock Number 4730-01-333-3018, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Hydraflow. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-333-3018 |
| Primary Part Number | VC513-20AE |
| Item Name | Coupling Assembly,tube,flexible |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydraflow |
| Status | ACTIVE |
| Tube Outside Diameter for Which Designed | 1.250 INCHES NOMINAL IN |
| Style Designator | FLEXIBLE COUPLING ASSEMBLY |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024, T6 FED SPEC 1ST MATERIAL RESPONSE |
| Surface Treatment | ANODIZE AND PASSIVATE |
| Material | ALUMINUM ALLOY 2024 AND STEEL CORROSION RESISTING |
| 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 |
|---|---|
| LE277-0008-0020 | The Boeing Company Div Legacy Am&m (USA) |
| VC513-20AE PRIMARY | Hydraflow (USA) |
| W701N201W20DE PRIMARY | Transdigm Inc Div Adelwiggins Group (USA) |
| Reference | Meaning |
|---|---|
| LE277-0008 | 7/1 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
NSN 4730-01-333-3018 is a Coupling Assembly,tube,flexible, manufactured by Hydraflow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-333-3018 has 3 manufacturer part numbers on file: LE277-0008-0020 (The Boeing Company Div Legacy Am&m), VC513-20AE (Hydraflow), W701N201W20DE (Transdigm Inc Div Adelwiggins Group).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-333-3019. Verify interchangeability with system specifications before substitution.
Key specifications for VC513-20AE: Tube Outside Diameter for Which Designed: 1.250 INCHES NOMINAL IN; Style Designator: FLEXIBLE COUPLING ASSEMBLY; Material Document and Classification: QQ-A-225/6, ALLOY 2024, T6 FED SPEC 1ST MATERIAL RESPONSE; Special Features: DYE MAGENTA COLOR. 5 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.