The Coupling,tube, cataloged under National Stock Number 4730-01-527-9345, 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 The Boeing Company Div Defense. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-527-9345 |
| Primary Part Number | ST7M406-20D |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Connection Style | GROOVED (TUBE) SECOND END |
| Tubing Wall Nominal Thickness for Which Designed | 0.035 INCHES FIRST END IN |
| Nominal Overall Length | 0.828 INCHES IN |
| Connection Type | GROOVED COUPLING SECOND END |
| Style Designator | GROOVED AND BEVELED |
| Nominal Outside Diameter Tube Accommodated | 1.250 INCHES FIRST END IN |
| Nominal Coupling Size Accommodated | 1.250 INCHES SECOND END IN |
| Material | ALUMINUM ALLOY 6061 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 |
|---|---|
| W903B20D | Transdigm Inc Div Adelwiggins Group (USA) |
| 14F33-20D | Hydraflow (USA) |
| ST7M406-20D PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| ST7M406 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 4730-01-527-9345 is a Coupling,tube, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-527-9345 has 3 manufacturer part numbers on file: W903B20D (Transdigm Inc Div Adelwiggins Group), 14F33-20D (Hydraflow), ST7M406-20D (The Boeing Company Div Defense).
Key specifications for ST7M406-20D: Connection Style: GROOVED (TUBE) SECOND END; Tubing Wall Nominal Thickness for Which Designed: 0.035 INCHES FIRST END IN; Nominal Overall Length: 0.828 INCHES IN; Connection Type: GROOVED COUPLING SECOND END. 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.