The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-01-524-7678, 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 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-524-7678 |
| Primary Part Number | 6393051-1 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 1.500 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 1.000 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Style Designator | INVERTED NUT, TUBE, FLARE |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1-11 1/2 |
| Screw Thread Series Designator | NPT |
| Material | NICKEL ALLOY |
| Smallest Inside Diameter | 1.000 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 6393438 FIND 010 | Naval Sea Systems Command (USA) |
| 6393051-1 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4730-01-524-7678 is a Inverted Nut,tube Coupling, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-524-7678 has 2 manufacturer part numbers on file: 6393438 FIND 010 (Naval Sea Systems Command), 6393051-1 (Naval Sea Systems Command).
Key specifications for 6393051-1: Width Across Flats: 1.500 INCHES NOMINAL IN; Tube Outside Diameter for Which Designed: 1.000 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Style Designator: INVERTED NUT, TUBE, FLARE. 9 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.