The Union,pipe to Tube, cataloged under National Stock Number 4730-01-307-8430, 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 18 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-307-8430 |
| Item Name | Union,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | ROUND SECOND END |
| Flange Face Design | PLAIN SECOND END |
| Connection Style | REDUCED SOCKET (TUBE) FIRST END |
| Coupling Flange Shape | ROUND |
| Tubing Wall Nominal Thickness for Which Designed | 0.069 INCHES FIRST END IN |
| Nominal Overall Length | 5.250 INCHES IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Style Designator | SCREWED |
| Material Document and Classification | MIL-C-15726,70-30 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | GASKET |
| Nominal Outside Diameter | 0.610 INCHES SECOND END IN |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Material | COPPER ALLOY OVERALL |
| Nominal Thickness | 0.097 INCHES SECOND END IN |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| 17-97-5289A | 5/2 Secondary reference U.S. Government activity |
| 845-4775990 | D/9 Drawing number reference only U.S. Government activity |
| 2621-791-05 | D/9 Drawing number reference only U.S. Government activity |
| 845-4775990-71X5.25 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-791-05 PIECE 71X5.25 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-307-8430 is a Union,pipe to Tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 4730-01-307-8431, 4730-01-307-8432, 4730-01-307-8437. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-307-8430: Flange Shape: ROUND SECOND END; Flange Face Design: PLAIN SECOND END; Connection Style: REDUCED SOCKET (TUBE) FIRST END; Coupling Flange Shape: ROUND. 18 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.