The Union,pipe to Tube, cataloged under National Stock Number 4730-01-307-8428, 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 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-307-8428 |
| Item Name | Union,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | ROUND FIRST END |
| Flange Face Design | PLAIN SWIVEL WITH GASKET GROOVE FIRST END |
| Connection Style | BEVELED (TUBE) SECOND END |
| Tubing Wall Nominal Thickness for Which Designed | 0.137 INCHES SECOND END IN |
| Nominal Overall Length | 2.250 INCHES IN |
| Connection Type | UNTHREADED EXTERNAL TUBE SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | FLANGED |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | RECESSED |
| Nominal Outside Diameter | 1.625 INCHES FIRST END IN |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Material | COPPER ALLOY OVERALL |
| Nominal Thickness | 0.312 INCHES FIRST END 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 |
|---|---|
| 2621-791-01 | D/9 Drawing number reference only U.S. Government activity |
| 2621-791-01 ASSY 9A | 3/2 Design control — primary reference U.S. Government activity |
| 15-97-5206A | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-307-8428 is a Union,pipe to Tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-307-8428: Flange Shape: ROUND FIRST END; Flange Face Design: PLAIN SWIVEL WITH GASKET GROOVE FIRST END; Connection Style: BEVELED (TUBE) SECOND END; Tubing Wall Nominal Thickness for Which Designed: 0.137 INCHES SECOND END IN. 16 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.