The Bell Crank, cataloged under National Stock Number 3040-00-004-4890, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-004-4890 |
| Primary Part Number | A51C34511-5 |
| Item Name | Bell Crank |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 3.000 INCHES NOMINAL SECOND END IN |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 2.648 INCHES NOMINAL FIRST END IN |
| End Hole/ball Diameter | 0.375 INCHES NOMINAL FIRST END IN |
| End Hole/ball Diameter | 0.250 INCHES MINIMUM AND 0.251 INCHES MAXIMUM SECOND END IN |
| Bore Length | 2.780 INCHES MINIMUM AND 2.780 INCHES MINIMUM AND 2.790 INCHES MAXIMUM2.790 INCHES MAXIMUM IN |
| Criticality Code Justification | ABXV AND ABXV AND CZLNCZLN |
| Style Designator | RAISED FACE PIVOT HOLE, CLEVIS BOTH ENDS |
| Features Provided | BEARINGBEARING |
| Bore Diameter | 0.749 INCHES NOMINAL0.749 INCHES NOMINAL IN |
| Material | TITANIUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A51C34511-5 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| A51C34511-3 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51C34511-5 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51C34511-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51C34511-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51C34511-5 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 3040-00-004-4890 is a Bell Crank, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-004-4890 has 2 manufacturer part numbers on file: A51C34511-5 (Northrop Grumman Systems Corporation), A51C34511-3 (Northrop Grumman Systems Corporation).
Key specifications for A51C34511-5: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 3.000 INCHES NOMINAL SECOND END IN; Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 2.648 INCHES NOMINAL FIRST END IN; End Hole/ball Diameter: 0.375 INCHES NOMINAL FIRST END IN; End Hole/ball Diameter: 0.250 INCHES MINIMUM AND 0.251 INCHES MAXIMUM SECOND END IN. 10 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.