The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-01-044-2680, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-044-2680 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 0.187 INCHES NOMINAL IN |
| Style Designator | INVERTED NUT, TUBE, COMPRESSION |
| Thread Direction | RIGHT-HAND |
| Seat Radius | 0.125 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 0.375-24 |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Material | COPPER ALLOY |
| Fabrication Method | BAR STOCK, MACHINED |
| Smallest Inside Diameter | 0.188 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 |
| Reference | Meaning |
|---|---|
| 365 | 5/9 Secondary reference Trico Products Corporation |
| 365-M | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-044-2680 is a Inverted Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-044-2680: Width Across Flats: 0.375 INCHES NOMINAL IN; Tube Outside Diameter for Which Designed: 0.187 INCHES NOMINAL IN; Style Designator: INVERTED NUT, TUBE, COMPRESSION; Overall Length: 0.500 INCHES NOMINAL IN. 12 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.