The Bell Crank, cataloged under National Stock Number 3040-01-504-4839, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-504-4839 |
| Primary Part Number | 124-6938645 PART 238-239 |
| Item Name | Bell Crank |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 2.46875 INCHES NOMINAL ALL ENDS IN |
| End Hole/ball Diameter | 0.624 INCHES MINIMUM AND 0.625 INCHES MAXIMUM ALL ENDS IN |
| Bore Length | 1.000 INCHES NOMINAL IN |
| Style Designator | FLAT, RAISED FACE PIVOT HOLE, ONE OR MORE HOLES BOTH ARMS |
| Material Document and Classification | GRADE B, CLASS U, 6-1/2 X 4-1/2 MIL SPEC SINGLE MATERIAL RESPONSE AND GRADE A, CLASS U, 2-1/8 DIA. MIL SPEC SINGLE MATERIAL RESPONSE |
| Fulcrum Bore Shape | PLAIN |
| Bore Diameter | 1.1245 INCHES MINIMUM AND 1.1255 INCHES MAXIMUM 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 |
| Part Number | Manufacturer |
|---|---|
| 124-6938645 PART 238-239 PRIMARY | Naval Sea Systems Command (USA) |
| 1500-295 PART 238-239 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 6938645 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-504-4839 is a Bell Crank, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-504-4839 has 2 manufacturer part numbers on file: 124-6938645 PART 238-239 (Naval Sea Systems Command), 1500-295 PART 238-239 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 124-6938645 PART 238-239: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 2.46875 INCHES NOMINAL ALL ENDS IN; End Hole/ball Diameter: 0.624 INCHES MINIMUM AND 0.625 INCHES MAXIMUM ALL ENDS IN; Bore Length: 1.000 INCHES NOMINAL IN; Style Designator: FLAT, RAISED FACE PIVOT HOLE, ONE OR MORE HOLES BOTH ARMS. 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.