The Reducer,tube, cataloged under National Stock Number 4730-01-013-5776, 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 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-013-5776 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 PREINSERTED BRAZING RING |
| Connection Style | PLAIN (TUBE) SECOND END |
| Connection Style | STREAMLINED W/ ONE BRAZING RING (TUBE) FIRST END |
| Tubing Wall Nominal Thickness for Which Designed | 0.180 INCHES FIRST END IN |
| Nominal Overall Length | 2.250 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED EXTERNAL TUBE SECOND END |
| Nominal Outside Diameter Tube Accommodated | 4.000 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 4.500 INCHES SECOND END IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Specification/standard Data | 81349-MIL-F-1183J GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 218.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | A TYPE |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| MIL-F-1183 | 4/1 Identification reference U.S. Government activity |
NSN 4730-01-013-5776 is a Reducer,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-013-5776: Furnished Items and Quantity: 1 PREINSERTED BRAZING RING; Connection Style: PLAIN (TUBE) SECOND END; Connection Style: STREAMLINED W/ ONE BRAZING RING (TUBE) FIRST END; Tubing Wall Nominal Thickness for Which Designed: 0.180 INCHES FIRST END IN. 15 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.