The Nut,tube Coupling, cataloged under National Stock Number 4730-00-433-3224, 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 14 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-433-3224 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 2.938 INCHES NOMINAL IN |
| Thread Series | UN |
| Seat Angle | 33.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.500 INCHES IN |
| Specification/standard Data | 88044-AN817 GOVERNMENT STANDARD |
| Nut Height | 2.750 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| Smallest Inside Diameter | 2.014 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 2.000 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 |
| Reference | Meaning |
|---|---|
| AN817-32 | 5/1 Secondary reference Aerofit, Llc |
| AN817-32 | 5/1 Secondary reference Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| AN817-32 | 5/1 Secondary reference Precision Form Rivet Inc |
| AN817-32 | 2/2 Government specification standardization U.S. Government activity |
| AN817-32 | 5/9 Secondary reference Crown Fitting Co Inc |
| AN817-32 | 5/1 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| AN817-32 | 5/9 Secondary reference Collins Engineering Corp |
| AN817-32 | 5/1 Secondary reference Hydro-Fitting Manufacturing Corporation |
| AN817-32 | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
NSN 4730-00-433-3224 is a Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-433-3224: Width Across Flats: 2.938 INCHES NOMINAL IN; Thread Series: UN; Seat Angle: 33.00 DEGREES NOMINAL; Thread Direction: RIGHT-HAND. 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.