The Reducer,tube, cataloged under National Stock Number 4730-01-151-3847, 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 Cbc Machine. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-151-3847 |
| Primary Part Number | TYPE253 3/4 IN.IPS |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Cbc Machine |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) SECOND END |
| Connection Style | PLAIN (TUBE) FIRST END |
| Nominal Overall Length | 5.641 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED EXTERNAL TUBE SECOND END |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 1.500 INCHES SECOND END IN |
| Nominal Thread Size | 1.375 INCHES FIRST END IN |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 16 FIRST END |
| Material | ALUMINUM 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 |
| Part Number | Manufacturer |
|---|---|
| TYPE253 3/4 IN.IPS PRIMARY | Cbc Machine (USA) |
| Reference | Meaning |
|---|---|
| TYPE 253 T.O.E. | 5/1 Secondary reference Cbc Machine |
NSN 4730-01-151-3847 is a Reducer,tube, manufactured by Cbc Machine, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-151-3847 has 1 manufacturer part number on file: TYPE253 3/4 IN.IPS (Cbc Machine).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-153-8376. Verify interchangeability with system specifications before substitution.
Key specifications for TYPE253 3/4 IN.IPS: Connection Style: PLAIN (TUBE) SECOND END; Connection Style: PLAIN (TUBE) FIRST END; Nominal Overall Length: 5.641 INCHES IN; Connection Type: THREADED EXTERNAL TUBE FIRST END. 13 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.