The Gearshaft,multiple Gears, cataloged under National Stock Number 3040-00-181-3116, 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 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-181-3116 |
| Primary Part Number | 678506 |
| Item Name | Gearshaft,multiple Gears |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Bmt Aerospace Usa, Inc. |
| Status | ACTIVE |
| Teeth Quantity | 39 FIRST GEAR |
| Teeth Quantity | 59 SECOND GEAR |
| Gear Quantity | 2 |
| Diametral Pitch | 10 FIRST GEAR |
| Diametral Pitch | 50 SECOND GEAR |
| Gear Type | SPUR ALL GEARS |
| Criticality Code Justification | FEAT |
| Material | STEEL OVERALL |
| 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 |
NSN 3040-00-181-3116 is a Gearshaft,multiple Gears, manufactured by Bmt Aerospace Usa, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-181-3116 has 3 manufacturer part numbers on file: 678506 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 678506 (Bmt Aerospace Usa, Inc.), 678506 (Arrow Gear Llc).
1 possible match (shared part number, not a government interchangeability claim): 5910-00-814-9529. Verify interchangeability with system specifications before substitution.
Key specifications for 678506: Teeth Quantity: 39 FIRST GEAR; Teeth Quantity: 59 SECOND GEAR; Gear Quantity: 2; Diametral Pitch: 10 FIRST GEAR. 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.
NSN 3040-00-181-3116 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.