The Gearshaft,spur, cataloged under National Stock Number 3040-00-412-0298, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 7 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. 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 | 3040-00-412-0298 |
| Primary Part Number | 659890 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Shaft Material | STEEL COMP E9310 |
| Teeth Quantity | 8 |
| Diametral Pitch | 10 |
| Gear Outside Diameter | 1.000 INCHES NOMINAL IN |
| Hardness Rating | 30.0 ROCKWELL A MINIMUM AND 40.0 ROCKWELL A MAXIMUM TEETH |
| Gear Material | STEEL COMP E9310 |
| Pressure Angle | 20.0000 DEGREES |
| 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 |
|---|---|
| 659890 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 3040-00-412-0298 is a Gearshaft,spur, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-412-0298 has 1 manufacturer part number on file: 659890 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-553-5978. Verify interchangeability with system specifications before substitution.
Key specifications for 659890: Shaft Material: STEEL COMP E9310; Teeth Quantity: 8; Diametral Pitch: 10; Gear Outside Diameter: 1.000 INCHES NOMINAL IN. 7 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.