The Nut,tube Coupling,reducing, cataloged under National Stock Number 4730-00-203-3368, 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 Mil-Craft Mfg., Inc.. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-203-3368 |
| Primary Part Number | RE66F499PC3 |
| Item Name | Nut,tube Coupling,reducing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mil-Craft Mfg., Inc. |
| Status | ACTIVE |
| Length to Shoulder | 3.125 INCHES NOMINAL IN |
| Width Across Flats | 4.750 INCHES NOMINAL IN |
| Thread Series | UNF |
| Seat Angle | 41.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 4.000 INCHES IN |
| Nut Height | 4.000 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 1B |
| Thread Quantity Per Inch | 12 |
| Material | ALUMINUM OVERALL |
| Fabrication Method | CAST |
| Smallest Inside Diameter | 3.063 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 3.000 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 |
|---|---|
| RE66F499PC3 | Mil-Craft Mfg., Inc. (USA) |
| Reference | Meaning |
|---|---|
| RE66F499PC3 | 5/9 Secondary reference Mindeco Corp |
| RE66F499P3ALTF | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-203-3368 is a Nut,tube Coupling,reducing, manufactured by Mil-Craft Mfg., Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-203-3368 has 1 manufacturer part number on file: RE66F499PC3 (Mil-Craft Mfg., Inc.).
Key specifications for RE66F499PC3: Length to Shoulder: 3.125 INCHES NOMINAL IN; Width Across Flats: 4.750 INCHES NOMINAL IN; Thread Series: UNF; Seat Angle: 41.00 DEGREES NOMINAL. 14 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.