The Bell Crank, cataloged under National Stock Number 3040-00-221-9057, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-221-9057 |
| Primary Part Number | 10870231 |
| Item Name | Bell Crank |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 2.844 INCHES NOMINAL FIRST END IN |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 4.359 INCHES NOMINAL SECOND END IN |
| End Hole/ball Diameter | 0.880 INCHES NOMINAL SECOND END IN |
| End Hole/ball Diameter | 0.505 INCHES MINIMUM AND 0.507 INCHES MAXIMUM FIRST END IN |
| Bore Length | 0.500 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-681, CLASS 2 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | PAINT |
| Bore Diameter | 0.690 INCHES MINIMUM AND 0.691 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 |
|---|---|
| 10870231 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-00-221-9057 is a Bell Crank, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-221-9057 has 1 manufacturer part number on file: 10870231 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 10870231: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 2.844 INCHES NOMINAL FIRST END IN; Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 4.359 INCHES NOMINAL SECOND END IN; End Hole/ball Diameter: 0.880 INCHES NOMINAL SECOND END IN; End Hole/ball Diameter: 0.505 INCHES MINIMUM AND 0.507 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.
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.