The Reducer,pipe, cataloged under National Stock Number 4730-01-042-4640, 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 20 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-042-4640 |
| Item Name | Reducer,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 BRAZING RING |
| Nominal Pipe Size Accommodated | 3.500 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 3.000 INCHES FIRST END IN |
| Connection Style | SOCKET W/ GROVE (PIPE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 2.188 INCHES IN |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | UNTHREADED EXTERNAL PIPE SECOND END |
| Material Document and Classification | ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Specification/standard Data | 81349-MIL-F-1183 GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 425.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Nondefinitive Spec/std Data | A TYPE AND 2 FIGURE |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE STD ALL ENDS |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| 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 | 5/9 Secondary reference U.S. Government activity |
| 5157-549 | 5/1 Secondary reference Flagg Stanley G & Co Inc Dba Flagg Brass |
| M1183/8-59A | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-1183/8 | 4/1 Identification reference U.S. Government activity |
| 00699067574311 | 5/1 Secondary reference Flagg Stanley G & Co Inc Dba Flagg Brass |
| 5157-549 3 1/2 | C/1 Advisory reference — outside the item-of-supply concept Flagg Stanley G & Co Inc Dba Flagg Brass |
NSN 4730-01-042-4640 is a Reducer,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-042-4640: Furnished Items and Quantity: 1 BRAZING RING; Nominal Pipe Size Accommodated: 3.500 INCHES SECOND END IN; Nominal Pipe Size Accommodated: 3.000 INCHES FIRST END IN; Connection Style: SOCKET W/ GROVE (PIPE) FIRST END. 20 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.