The Tube Assembly,metal, cataloged under National Stock Number 4710-01-340-4145, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-340-4145 |
| Primary Part Number | 70307-82407-042 |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Design Form | PREBENT |
| Mating End Quantity | 1 SECOND END |
| Mating End Quantity | 1 FIRST END |
| Bolt Hole Diameter | 0.328 INCHES NOMINAL SECOND END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.875 INCHES FIRST END IN |
| End Connection Style | EXTERNAL SEAT OR GASKET SEAL FIRST END |
| End Connection Style | PLAIN SECOND END |
| Bolt Hole Quantity | 4 SECOND END |
| Bolt Circle Diameter | 3.359 INCHES NOMINAL SECOND END IN |
| Thread Class | 3A FIRST END A |
| Material | ALUMINUM ALLOY SECOND END |
| Material | ALUMINUM ALLOY FIRST END |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END |
| End Connection Spec/std | MIL,MS20756,P/N MS20756-D32 |
| 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 |
|---|---|
| 70307-82407-042 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 70307-82407 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 4710-01-340-4145 is a Tube Assembly,metal, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-340-4145 has 1 manufacturer part number on file: 70307-82407-042 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
1 possible match (shared part number, not a government interchangeability claim): 4710-01-359-2537. Verify interchangeability with system specifications before substitution.
Key specifications for 70307-82407-042: Design Form: PREBENT; Mating End Quantity: 1 SECOND END; Mating End Quantity: 1 FIRST END; Bolt Hole Diameter: 0.328 INCHES NOMINAL SECOND END IN. 15 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 4710-01-340-4145 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.