The Bell Crank, cataloged under National Stock Number 3040-01-021-8255, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment 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7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-01-021-8255 |
| Item Name | Bell Crank |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 3.295 INCHES MINIMUM AND 3.305 INCHES MAXIMUM FIRST END IN |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 4.345 INCHES MINIMUM AND 4.355 INCHES MAXIMUM SECOND END IN |
| Bore Length | 1.948 INCHES MINIMUM AND 1.953 INCHES MAXIMUM IN |
| Counterbore Depth | 0.875 INCHES NOMINAL IN |
| Counterbore Diameter | 0.700 INCHES NOMINAL IN |
| Bore Diameter | 0.453 INCHES MINIMUM AND 0.461 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| K653707-3 | 3/2 Design control — primary reference U.S. Government activity |
| 3040PL1300639 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3040-01-021-8255 is a Bell Crank, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-021-8255: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 3.295 INCHES MINIMUM AND 3.305 INCHES MAXIMUM FIRST END IN; Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 4.345 INCHES MINIMUM AND 4.355 INCHES MAXIMUM SECOND END IN; Bore Length: 1.948 INCHES MINIMUM AND 1.953 INCHES MAXIMUM IN; Counterbore Depth: 0.875 INCHES NOMINAL 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.