The Bell Crank, cataloged under National Stock Number 3040-01-306-6474, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-306-6474 |
| Primary Part Number | 3930AS540-1 |
| Item Name | Bell Crank |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Bore Length | 2.812 INCHES NOMINAL IN |
| Bore Diameter | 0.437 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 3930AS540-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 3930AS540-1 | Vertex Modernization and Sustainment Llc (USA) |
| Reference | Meaning |
|---|---|
| 10107012 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A733023-2005 | 5/9 Secondary reference The Boeing Company Div Defense |
| 74A733023 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 74A733023-2005 | 5/9 Secondary reference Vertex Modernization and Sustainment Llc |
NSN 3040-01-306-6474 is a Bell Crank, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-306-6474 has 2 manufacturer part numbers on file: 3930AS540-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 3930AS540-1 (Vertex Modernization and Sustainment Llc).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-307-3867. Verify interchangeability with system specifications before substitution.
Key specifications for 3930AS540-1: Bore Length: 2.812 INCHES NOMINAL IN; Bore Diameter: 0.437 INCHES NOMINAL IN; Material: STEEL. 3 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 3040-01-306-6474 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.