The Gearshaft,helical, cataloged under National Stock Number 3040-00-752-1685, 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 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-752-1685 |
| Primary Part Number | 7521685 |
| Item Name | Gearshaft,helical |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL |
| Teeth Quantity | 12 |
| Gear Material | STEEL |
| Face Width | 2.438 INCHES NOMINAL IN |
| 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 |
|---|---|
| 7521685 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 3891B730 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 801E562 | 5/9 Secondary reference Kersey / American Lafrance a Div of Figgie International Inc |
| 913747 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 25207521685 | 5/9 Secondary reference E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 2658D5 | 5/9 Secondary reference Diamond Reo Truck Co |
NSN 3040-00-752-1685 is a Gearshaft,helical, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-752-1685 has 2 manufacturer part numbers on file: 7521685 (U S Army Tank Automotive Command Amsta-Im-Mm), 3891B730 (Meritor Heavy Vehicle Systems, Llc).
Key specifications for 7521685: Shaft Type: SHOULDERED; Shaft Material: STEEL; Teeth Quantity: 12; Overall Length: 8.031 INCHES NOMINAL IN. 5 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.