The Nut Assembly,tube Coupling, cataloged under National Stock Number 4730-01-028-7976, 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 Sae International Dba Sae International. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-028-7976 |
| Primary Part Number | AS1713D56 |
| Item Name | Nut Assembly,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Working Temp and Service Type | 65.0 DEG FAHRENHEIT MINIMUM JET FUEL AND 160.0 DEG FAHRENHEIT MAXIMUM JET FUEL |
| Tube Outside Diameter for Which Designed | 3.500 INCHES NOMINAL IN |
| Style Designator | NUT ASSEMBLY |
| Outside Diameter | 4.427 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 4.250-12 |
| Screw Thread Series Designator | UN |
| Surface Treatment | ANODIZE |
| Thread Class | 2B |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| AS1713D56 PRIMARY | Sae International Dba Sae International (USA) |
| GC550EH56A | Northrop Grumman Systems Corporation (USA) |
| 63551-56A | Transdigm Inc Div Adelwiggins Group (USA) |
| Reference | Meaning |
|---|---|
| AS1713D56 | 3/9 Design control — primary reference U.S. Government activity |
| SAE-AS1710 | 3/1 Design control — primary reference Sae International Dba Sae International |
| GC550EH | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4730-01-028-7976 is a Nut Assembly,tube Coupling, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-028-7976 has 3 manufacturer part numbers on file: AS1713D56 (Sae International Dba Sae International), GC550EH56A (Northrop Grumman Systems Corporation), 63551-56A (Transdigm Inc Div Adelwiggins Group).
Key specifications for AS1713D56: Working Temp and Service Type: 65.0 DEG FAHRENHEIT MINIMUM JET FUEL AND 160.0 DEG FAHRENHEIT MAXIMUM JET FUEL; Tube Outside Diameter for Which Designed: 3.500 INCHES NOMINAL IN; Style Designator: NUT ASSEMBLY; Overall Length: 0.701 INCHES NOMINAL IN. 11 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.