The Coupling Assembly,tube,flexible, cataloged under National Stock Number 4730-00-820-8561, 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 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-820-8561 |
| Primary Part Number | 63051-20A |
| 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 |
| Working Temp and Service Type | 200.0 DEG FAHRENHEIT NOMINAL JET FUEL |
| Tube Outside Diameter for Which Designed | 1.250 INCHES NOMINAL IN |
| Style Designator | FLEXIBLE COUPLING ASSEMBLY |
| Material Document and Classification | QQ-A-225/6 ASSN STD SINGLE MATERIAL RESPONSE |
| Outside Diameter | 2.032 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE |
| 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 |
|---|---|
| 63051-20A PRIMARY | Transdigm Inc Div Adelwiggins Group (USA) |
| AS1712D20 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| GC550CF20A | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| AS1712D20 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS1710 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 4730-00-820-8561 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 4730-00-820-8561 has 2 manufacturer part numbers on file: 63051-20A (Transdigm Inc Div Adelwiggins Group), AS1712D20 (Sae International Dba Sae International).
Key specifications for 63051-20A: Working Temp and Service Type: 200.0 DEG FAHRENHEIT NOMINAL JET FUEL; Tube Outside Diameter for Which Designed: 1.250 INCHES NOMINAL IN; Style Designator: FLEXIBLE COUPLING ASSEMBLY; Material Document and Classification: QQ-A-225/6 ASSN STD SINGLE MATERIAL RESPONSE. 8 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.