The Bell Crank, cataloged under National Stock Number 1680-00-602-3879, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-00-602-3879 |
| Primary Part Number | C4WM1290-1 |
| Item Name | Bell Crank |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| Bore Length | 0.345 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Counterbore Depth | 0.250 INCHES NOMINAL IN |
| Counterbore Diameter | 0.950 INCHES NOMINAL IN |
| Bore Diameter | 1.0630 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| C4WM1290-1 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
NSN 1680-00-602-3879 is a Bell Crank, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-00-602-3879 has 1 manufacturer part number on file: C4WM1290-1 (De Havilland Aircraft of Canada Limited).
Key specifications for C4WM1290-1: Bore Length: 0.345 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN; Counterbore Depth: 0.250 INCHES NOMINAL IN; Counterbore Diameter: 0.950 INCHES NOMINAL IN; Bore Diameter: 1.0630 INCHES NOMINAL IN. 5 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 1680-00-602-3879 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.