The Nut,tube Coupling, cataloged under National Stock Number 4730-01-226-1965, 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 Naval Sea Systems Command. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-226-1965 |
| Primary Part Number | 5262763 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 2.000 INCHES NOMINAL IN |
| Thread Series | UNS |
| Thread Pitch Diameters | +1.6900 TO 1.7500 INCHES IN |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.750 INCHES IN |
| Nut Height | 0.900 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 1.250 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 1.250 INCHES 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 |
|---|---|
| 5262763 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4730-01-226-1965 is a Nut,tube Coupling, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-226-1965 has 1 manufacturer part number on file: 5262763 (Naval Sea Systems Command).
Key specifications for 5262763: Width Across Flats: 2.000 INCHES NOMINAL IN; Thread Series: UNS; Thread Pitch Diameters: +1.6900 TO 1.7500 INCHES IN; Material Document and Classification: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 14 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.