The Bell Crank, cataloged under National Stock Number 3040-01-458-6544, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-458-6544 |
| 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 | 6.000 INCHES NOMINAL ALL ENDS IN |
| End Hole/ball Diameter | 3.000 INCHES NOMINAL ALL ENDS IN |
| Bore Length | 5.000 INCHES NOMINAL IN |
| Style Designator | CLEVIS ENDS |
| Material Document and Classification | MIL-S-15083 MIL SPEC SINGLE MATERIAL RESPONSE |
| Fulcrum Bore Shape | PLAIN |
| Bore Diameter | 3.187 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 703-1554057 P/N 05 | 5/2 Secondary reference U.S. Government activity |
| 701-1897730 P/N 18 | 3/2 Design control — primary reference U.S. Government activity |
| 703-1554057 | D/9 Drawing number reference only U.S. Government activity |
| 701-1897730 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-458-6544 is a Bell Crank, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-458-7965, 2040-01-459-3765. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-458-6544: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 6.000 INCHES NOMINAL ALL ENDS IN; End Hole/ball Diameter: 3.000 INCHES NOMINAL ALL ENDS IN; Bore Length: 5.000 INCHES NOMINAL IN; Style Designator: CLEVIS ENDS. 8 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.