The Nut,tube Coupling, cataloged under National Stock Number 4730-01-210-8750, 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 Industrial Technologies & Services Etten-Leur. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-210-8750 |
| Primary Part Number | RS7810-261-U04 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Industrial Technologies & Services Etten-Leur |
| Status | ACTIVE |
| Width Across Flats | 0.437 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Height | 0.343 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | COPPER ALLOY 360 OVERALL |
| Fabrication Method | MACHINED |
| Nominal Tube Outside Diameter | 0.250 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 |
|---|---|
| RS7810-261-U04 | Industrial Technologies & Services Etten-Leur (NLD) |
| 352258902594 | Thales Nederland (NLD) |
| Reference | Meaning |
|---|---|
| 261U 1/4 | 3/9 Design control — primary reference Imperial |
| 261-U-04 | 5/9 Secondary reference Imperial |
NSN 4730-01-210-8750 is a Nut,tube Coupling, manufactured by Industrial Technologies & Services Etten-Leur, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-210-8750 has 2 manufacturer part numbers on file: RS7810-261-U04 (Industrial Technologies & Services Etten-Leur), 352258902594 (Thales Nederland).
Key specifications for RS7810-261-U04: Width Across Flats: 0.437 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.375 INCHES 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.