The Bell Crank, cataloged under National Stock Number 3040-00-421-8027, 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 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-421-8027 |
| Primary Part Number | 12A51C13508-2 |
| 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 | 2.261 INCHES NOMINAL FIRST END IN |
| End Hole/ball Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM SECOND END IN |
| End Hole/ball Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM FIRST END IN |
| FSC Application Data | FLIGHT CONTROL,AIRCRAFT |
| Bore Length | 0.938 INCHES MINIMUM AND 0.943 INCHES MAXIMUM IN |
| Style Designator | RAISED FACE PIVOT HOLE, CLEVIS BOTH ENDS |
| Bore Diameter | 1.123 INCHES MINIMUM AND 1.124 INCHES MAXIMUM 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 |
|---|---|
| 12A51C13508-2 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51C13508-2 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 3040-00-421-8027 is a Bell Crank, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-421-8027 has 1 manufacturer part number on file: 12A51C13508-2 (Northrop Grumman Systems Corporation).
Key specifications for 12A51C13508-2: 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: 2.261 INCHES NOMINAL FIRST END IN; End Hole/ball Diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM SECOND END IN; End Hole/ball Diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM FIRST END IN. 9 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 3040-00-421-8027 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.