The Reducer,tube, cataloged under National Stock Number 4730-01-080-3897, 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 Flagg Stanley G & Co Inc Dba Flagg Brass. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-080-3897 |
| Primary Part Number | 5157-698 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Flagg Stanley G & Co Inc Dba Flagg Brass |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 PREINSERTED BRAZING RING |
| Connection Style | PLAIN (TUBE) SECOND END |
| Connection Style | REDUCED SOCKET W/ ONE BRAZING RING (TUBE) FIRST END |
| Nominal Overall Length | 3.375 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED EXTERNAL TUBE SECOND END |
| Material Document and Classification | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 6.625 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 4.500 INCHES FIRST END IN |
| 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 |
| Departure From Cited Designator | AS MODIFIED BY SIZE |
| Specification/standard Data | 81349-MIL-F-1183G GOVERNMENT SPECIFICATION G |
| Maximum Operating Temp | 425.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Nondefinitive Spec/std Data | A TYPE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 5157-698 PRIMARY | Flagg Stanley G & Co Inc Dba Flagg Brass (USA) |
| NS269-9664 | Signal-Hill Corp (USA) |
| Reference | Meaning |
|---|---|
| MIL-F-1183 | 5/9 Secondary reference U.S. Government activity |
| 00699067575912 | 5/1 Secondary reference Flagg Stanley G & Co Inc Dba Flagg Brass |
NSN 4730-01-080-3897 is a Reducer,tube, manufactured by Flagg Stanley G & Co Inc Dba Flagg Brass, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-080-3897 has 2 manufacturer part numbers on file: 5157-698 (Flagg Stanley G & Co Inc Dba Flagg Brass), NS269-9664 (Signal-Hill Corp).
Key specifications for 5157-698: Furnished Items and Quantity: 1 PREINSERTED BRAZING RING; Connection Style: PLAIN (TUBE) SECOND END; Connection Style: REDUCED SOCKET W/ ONE BRAZING RING (TUBE) FIRST END; Nominal Overall Length: 3.375 INCHES IN. 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.