The Bell Crank, cataloged under National Stock Number 1680-00-306-3559, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-00-306-3559 |
| Item Name | Bell Crank |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 0.500 INCHES NOMINAL FIRST END IN |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 0.680 INCHES NOMINAL SECOND END IN |
| End Hole/ball Diameter | 0.094 INCHES NOMINAL FIRST END IN |
| End Hole/ball Diameter | 0.195 INCHES NOMINAL SECOND END IN |
| Bore Length | 0.080 INCHES NOMINAL IN |
| Style Designator | FLAT, ONE OR MORE HOLES BOTH ARMS |
| Bore Diameter | 0.129 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 339701 | 3/2 Design control — primary reference U.S. Government activity |
| 339701 | 5/9 Secondary reference Lockheed Martin Corp Lockheed Martin Aeronautical Systems Burbank Opns |
NSN 1680-00-306-3559 is a Bell Crank, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-00-306-3559: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 0.500 INCHES NOMINAL FIRST END IN; Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 0.680 INCHES NOMINAL SECOND END IN; End Hole/ball Diameter: 0.094 INCHES NOMINAL FIRST END IN; End Hole/ball Diameter: 0.195 INCHES NOMINAL SECOND END IN. 7 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.