The Nut,tube Coupling, cataloged under National Stock Number 4730-01-473-4673, 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 Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-473-4673 |
| Primary Part Number | MN-7-DD |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc |
| Status | ACTIVE |
| Width Across Flats | 3.500 INCHES NOMINAL IN |
| Thread Series | UNS |
| Special Test Features | MN SERIES |
| Supplementary Features | PRESSURE RATING: 6,000PSI |
| Nominal Thread Size | 3.625 INCHES IN |
| Nut Height | 1.500 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 12.0 |
| Material | NICKEL ALLOY AND STEEL OVERALL |
| 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 |
|---|---|
| MN-7-DD | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (USA) |
| Reference | Meaning |
|---|---|
| 50N-7-MONEL | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-473-4673 is a Nut,tube Coupling, manufactured by Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-473-4673 has 1 manufacturer part number on file: MN-7-DD (Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc).
Key specifications for MN-7-DD: Width Across Flats: 3.500 INCHES NOMINAL IN; Thread Series: UNS; Special Test Features: MN SERIES; Supplementary Features: PRESSURE RATING: 6,000PSI. 8 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.