The Tube Assembly,metal, cataloged under National Stock Number 4710-00-678-8256, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-00-678-8256 |
| Primary Part Number | 7709520 |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| FSC Application Data | TRANSMISSION TO GOVERNOR OIL LINE |
| Seat Angle in Deg | 45.0 SINGLE END |
| Design Form | PREBENT |
| Mating End Quantity | 2 SINGLE END |
| Wall Thickness | 0.035 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND SINGLE END |
| Nominal Thread Size | 0.438 INCHES SINGLE END IN |
| End Connection Style | FLARE SINGLE END |
| Tube Outside Diameter | 0.247 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Thread Class | 2B SINGLE END |
| Material | STEEL TUBING |
| Material | COPPER ALLOY SINGLE END |
| Thread Series Designator | UNF SINGLE END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7709520 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 7709520 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 7709520 | Ordnance Parts and Engineering Co (USA) |
| Reference | Meaning |
|---|---|
| 4710006788256 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 4710-00-678-8256 is a Tube Assembly,metal, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-00-678-8256 has 3 manufacturer part numbers on file: 7709520 (Allison Transmission Inc Dba Allison Transmission, Inc), 7709520 (U S Army Tank Automotive Command Amsta-Im-Mm), 7709520 (Ordnance Parts and Engineering Co).
Key specifications for 7709520: FSC Application Data: TRANSMISSION TO GOVERNOR OIL LINE; Seat Angle in Deg: 45.0 SINGLE END; Design Form: PREBENT; Mating End Quantity: 2 SINGLE END. 13 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.
NSN 4710-00-678-8256 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.