The Nut,tube Coupling, cataloged under National Stock Number 4730-00-626-7589, 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 Swagelok Co. Government technical data includes 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-626-7589 |
| Primary Part Number | A-402-1 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.437 INCHES IN |
| Nut Height | 0.500 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | ALUMINUM OVERALL |
| Smallest Inside Diameter | 0.250 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.250 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 |
|---|---|
| 4NA | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| A-402-1 PRIMARY | Swagelok Co (USA) |
| 4BZ-A | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| Reference | Meaning |
|---|---|
| 4NA | 5/9 Secondary reference J R Douglass Company |
| 530473-15 | 5/2 Secondary reference U.S. Government activity |
| 4730PL0742836 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4730PL1837544 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4BZD | 5/9 Secondary reference Parker-Hannifin Corporation Div Instrumentation Products Division |
NSN 4730-00-626-7589 is a Nut,tube Coupling, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-626-7589 has 3 manufacturer part numbers on file: 4NA (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), A-402-1 (Swagelok Co), 4BZ-A (Parker-Hannifin Corporation Div Instrumentation Products Division).
Key specifications for A-402-1: Width Across Flats: 0.562 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.437 INCHES IN. 11 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.