The Reducer,tube, cataloged under National Stock Number 4730-00-289-8481, 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 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-289-8481 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | STREAMLINED W/ TWO BRAZING RINGS (TUBE) ALL ENDSSTREAMLINED W/ TWO BRAZING RINGS (TUBE) ALL ENDS |
| Tubing Wall Nominal Thickness for Which Designed | 0.140 INCHES FIRST END0.140 INCHES FIRST END IN |
| Tubing Wall Nominal Thickness for Which Designed | 0.140 INCHES SECOND END0.140 INCHES SECOND END IN |
| Nominal Overall Length | 1.380 INCHES1.380 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST ENDUNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED INTERNAL TUBE SECOND ENDUNTHREADED INTERNAL TUBE SECOND END |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLMIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.405 INCHES SECOND END0.405 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.540 INCHES FIRST END0.540 INCHES FIRST END IN |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSEWATER-OIL-GAS SINGLE RESPONSE |
| Material | COPPER ALLOY OVERALLCOPPER ALLOY OVERALL |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY END SIZESAS DIFFERENTIATED BY END SIZES |
| Reducer Type | CONCENTRICCONCENTRIC |
| 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 |
|---|---|
| 5000S4823-1385766 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4730-00-289-8481 is a Reducer,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-00-289-8490, 4730-00-542-4362, 4730-00-542-4370. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-289-8481: Connection Style: STREAMLINED W/ TWO BRAZING RINGS (TUBE) ALL ENDSSTREAMLINED W/ TWO BRAZING RINGS (TUBE) ALL ENDS; Tubing Wall Nominal Thickness for Which Designed: 0.140 INCHES FIRST END0.140 INCHES FIRST END IN; Tubing Wall Nominal Thickness for Which Designed: 0.140 INCHES SECOND END0.140 INCHES SECOND END IN; Nominal Overall Length: 1.380 INCHES1.380 INCHES IN. 14 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.