The Coupling Assembly,tube,flexible, cataloged under National Stock Number 4730-01-044-1914, 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 Transdigm Inc Div Adelwiggins Group. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-044-1914 |
| Primary Part Number | 63221-12 |
| Item Name | Coupling Assembly,tube,flexible |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Transdigm Inc Div Adelwiggins Group |
| Status | ACTIVE |
| Tube Outside Diameter for Which Designed | 0.750 INCHES NOMINAL IN |
| Style Designator | FLEXIBLE COUPLING ASSEMBLY |
| Outside Diameter | 1.532 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 |
| Working Pressure and Service Type | 125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL JET FUEL LBS |
| 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 |
|---|---|
| VC520-12A | Federal Industries, Inc. Dba Federal Industries Inc (USA) |
| 63221-12 PRIMARY | Transdigm Inc Div Adelwiggins Group (USA) |
| VC520-12A | Hydraflow (USA) |
| Reference | Meaning |
|---|---|
| GC550GR12 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 4730-01-044-1914 is a Coupling Assembly,tube,flexible, manufactured by Transdigm Inc Div Adelwiggins Group, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-044-1914 has 3 manufacturer part numbers on file: VC520-12A (Federal Industries, Inc. Dba Federal Industries Inc), 63221-12 (Transdigm Inc Div Adelwiggins Group), VC520-12A (Hydraflow).
Key specifications for 63221-12: Tube Outside Diameter for Which Designed: 0.750 INCHES NOMINAL IN; Style Designator: FLEXIBLE COUPLING ASSEMBLY; Overall Length: 2.813 INCHES NOMINAL IN; Outside Diameter: 1.532 INCHES NOMINAL IN. 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.