The Gearshaft,spur, cataloged under National Stock Number 3040-00-252-8073, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Bmt Aerospace Usa, Inc.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-00-252-8073 |
| Primary Part Number | 657936 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Bmt Aerospace Usa, Inc. |
| Status | ACTIVE |
| Shaft Material | STEEL |
| Criticality Code Justification | FEAT |
| Gear Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 657936 | Precision Gear Industries Llc (USA) |
| 657936 PRIMARY | Bmt Aerospace Usa, Inc. (USA) |
| 657936 PRIMARY | Triumph Gear Systems - Macomb, Inc (USA) |
| Reference | Meaning |
|---|---|
| 657936 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 657936 | 5/9 Secondary reference Aero Gear Incorporated |
| 657936 | 5/9 Secondary reference Glenco-Star |
| 657936 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 3040-00-252-8073 is a Gearshaft,spur, manufactured by Bmt Aerospace Usa, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-252-8073 has 3 manufacturer part numbers on file: 657936 (Precision Gear Industries Llc), 657936 (Bmt Aerospace Usa, Inc.), 657936 (Triumph Gear Systems - Macomb, Inc).
Key specifications for 657936: Shaft Material: STEEL; Criticality Code Justification: FEAT; Overall Length: 3.307 INCHES MAXIMUM IN; Gear 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 3040-00-252-8073 has DEMIL Code Q. 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.