The Reducer,pipe, cataloged under National Stock Number 4730-01-307-8437, 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16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-307-8437 |
| Item Name | Reducer,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | REDUCED SOCKET W/ ONE BRAZING RING (PIPE) SECOND END |
| Tubing Wall Nominal Thickness for Which Designed | 0.082 INCHES SECOND END IN |
| Nominal Overall Length | 1.380 INCHES IN |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | BUTT WELD TUBE SECOND END |
| Material Document and Classification | MIL-C-15726,70-30 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 1.062 INCHES FIRST END IN |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Thread Class | 3B FIRST END |
| Thread Quantity Per Inch | 16 FIRST END |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UN FIRST END |
| 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 |
|---|---|
| 2621-791-05 | D/9 Drawing number reference only U.S. Government activity |
| 2621-791-05 ASSY 120 | 3/2 Design control — primary reference U.S. Government activity |
| 4775900-120 | 3/2 Design control — primary reference U.S. Government activity |
| 4775900 | D/9 Drawing number reference only U.S. Government activity |
| 5343878-00F4A | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-307-8437 is a Reducer,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-307-8925, 4730-01-309-5119, 4730-01-314-8911. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-307-8437: Connection Style: PLAIN (PIPE) FIRST END; Connection Style: REDUCED SOCKET W/ ONE BRAZING RING (PIPE) SECOND END; Tubing Wall Nominal Thickness for Which Designed: 0.082 INCHES SECOND END IN; Nominal Overall Length: 1.380 INCHES 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.