The Tube Assembly,metal, cataloged under National Stock Number 4710-01-074-0668, is classified within Federal Supply Class 4710 (Pipe, Tube and Rigid Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Siemens Energy, Inc. Dba Dresser-Rand. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-074-0668 |
| Primary Part Number | 6394B |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Siemens Energy, Inc. Dba Dresser-Rand |
| Status | ACTIVE |
| Design Form | PREBENT |
| Mating End Quantity | 1 FIRST END |
| Mating End Quantity | 2 SECOND END |
| Wall Thickness | 0.095 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND SINGLE END |
| Nominal Thread Size | 1.375 INCHES SECOND END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| End Connection Style | EXTERNAL SEAT OR GASKET SEAL SECOND END |
| End Connection Style | PLAIN FIRST END |
| Tube Outside Diameter | 0.687 INCHES NOMINAL IN |
| Thread Class | 2A SECOND END A |
| Thread Class | 2B FIRST END |
| Material | STEEL FIRST END |
| Material | STEEL CORROSION RESISTING TUBING |
| Material | COPPER ALLOY SECOND END |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF SECOND END |
| 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 |
|---|---|
| 6394B PRIMARY | Siemens Energy, Inc. Dba Dresser-Rand (USA) |
| Reference | Meaning |
|---|---|
| 6394B | 5/9 Secondary reference U.S. Government activity |
| 200114L PC263 | 5/9 Secondary reference U.S. Government activity |
NSN 4710-01-074-0668 is a Tube Assembly,metal, manufactured by Siemens Energy, Inc. Dba Dresser-Rand, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-074-0668 has 1 manufacturer part number on file: 6394B (Siemens Energy, Inc. Dba Dresser-Rand).
Key specifications for 6394B: Design Form: PREBENT; Mating End Quantity: 1 FIRST END; Mating End Quantity: 2 SECOND END; Wall Thickness: 0.095 INCHES NOMINAL IN. 17 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.