The Tube Assembly,metal,branched, cataloged under National Stock Number 4710-01-122-0657, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-122-0657 |
| Primary Part Number | 70307-03017-045 |
| Item Name | Tube Assembly,metal,branched |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Branch Quantity | 3 |
| Design Form | STRAIGHT |
| Main Body Tube Outside Diameter | 0.250 INCHES IN |
| Main Body Tube Wall Thickness | 0.030 INCHES NOMINAL IN |
| Material | STEEL |
| Working Surface Length | 7.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 70307-03017-045 | Dash Engineering Inc Dba D E I (USA) |
| 70307-03017-045 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 70307-03017-045 | Aircraft Tubular Components Inc (USA) |
| Reference | Meaning |
|---|---|
| 70307-03017 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| 70307-03017-045 | 5/9 Secondary reference Liberty Aero Inc |
NSN 4710-01-122-0657 is a Tube Assembly,metal,branched, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-122-0657 has 3 manufacturer part numbers on file: 70307-03017-045 (Dash Engineering Inc Dba D E I), 70307-03017-045 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 70307-03017-045 (Aircraft Tubular Components Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4710-01-122-0659, 4710-01-125-9924. Verify interchangeability with system specifications before substitution.
Key specifications for 70307-03017-045: Branch Quantity: 3; Design Form: STRAIGHT; Main Body Tube Outside Diameter: 0.250 INCHES IN; Main Body Tube Wall Thickness: 0.030 INCHES NOMINAL IN. 6 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 4710-01-122-0657 has DEMIL Code Q. 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.