The Nut,tube Coupling,reducing, cataloged under National Stock Number 4730-00-650-2185, 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 15 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-650-2185 |
| Item Name | Nut,tube Coupling,reducing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Length to Shoulder | 1.156 INCHES NOMINAL IN |
| Width Across Flats | 1.625 INCHES NOMINAL IN |
| Thread Series | UNF |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.500 INCHES IN |
| Nut Height | 1.406 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 1118 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.635 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.625 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 |
| Reference | Meaning |
|---|---|
| 205-16-10 | 5/9 Secondary reference U.S. Government activity |
| 1655867PC15 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 205-16-10MF | 3/2 Design control — primary reference U.S. Government activity |
| 1655867 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 4730-00-650-2185 is a Nut,tube Coupling,reducing, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-650-2185: Length to Shoulder: 1.156 INCHES NOMINAL IN; Width Across Flats: 1.625 INCHES NOMINAL IN; Thread Series: UNF; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL. 15 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.