The Ferrule,swage,tube Coupling, cataloged under National Stock Number 4730-01-332-8720, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-332-8720 |
| Primary Part Number | AS1737D56 |
| Item Name | Ferrule,swage,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Slot Quantity | 5 |
| Style Designator | SINGLE FLANGE |
| Flange Inside Diameter | 3.479 INCHES NOMINAL IN |
| Sleeve Outside Diameter | 3.645 INCHES NOMINAL IN |
| Specification/standard Data | 81343-AS1737 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 56 SIZE |
| Casehardening Indicator | NOT CASEHARDENED |
| Slot Depth | 0.136 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| Flange Outside Diameter | 3.869 INCHES NOMINAL IN |
| Hose/tube Outside Diameter for Which Designed | 3.500 INCHES NOMINAL IN |
| 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 |
|---|---|
| AS1737D56 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS1730 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS1737D56 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4730-01-332-8720 is a Ferrule,swage,tube Coupling, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-332-8720 has 1 manufacturer part number on file: AS1737D56 (Sae International Dba Sae International).
Key specifications for AS1737D56: Slot Quantity: 5; Style Designator: SINGLE FLANGE; Flange Inside Diameter: 3.479 INCHES NOMINAL IN; Sleeve Outside Diameter: 3.645 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.