The Bell Crank, cataloged under National Stock Number 3040-01-500-5657, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-500-5657 |
| Primary Part Number | 754-7066812-59 |
| 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 | 8.500 INCHES NOMINAL SECOND END IN |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 7.875 INCHES NOMINAL FIRST END IN |
| End Hole/ball Diameter | 3.002 INCHES MINIMUM AND 3.004 INCHES MAXIMUM FIRST END IN |
| End Hole/ball Diameter | 3.002 INCHES MINIMUM AND 3.004 INCHES MAXIMUM SECOND END IN |
| Bore Length | 12.130 INCHES NOMINAL IN |
| Style Designator | CLEVIS, TONGUE |
| Fulcrum Bore Shape | SPLINED |
| Bore Diameter | 5.997 INCHES MINIMUM AND 6.000 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 754-7066812-59 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H553-1502-59 | 5/2 Secondary reference U.S. Government activity |
| 754-7066812 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-500-5657 is a Bell Crank, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-500-5657 has 1 manufacturer part number on file: 754-7066812-59 (Naval Sea Systems Command).
Key specifications for 754-7066812-59: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 8.500 INCHES NOMINAL SECOND END IN; Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 7.875 INCHES NOMINAL FIRST END IN; End Hole/ball Diameter: 3.002 INCHES MINIMUM AND 3.004 INCHES MAXIMUM FIRST END IN; End Hole/ball Diameter: 3.002 INCHES MINIMUM AND 3.004 INCHES MAXIMUM SECOND 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.
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.