The Shaft,shouldered, cataloged under National Stock Number 3040-01-339-7507, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-339-7507 |
| Primary Part Number | DS-937978 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| First End Pitch Diameter | 0.8000 INCHES NOMINAL IN |
| Step Quantity | 1 |
| First End Diameter | 0.6928 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.8900 INCHES MINIMUM AND 0.8997 INCHES MAXIMUM IN |
| First End Style | SPLINED (INVOLUTE) |
| First End Pressure Angle | 30.0 DEGREES NOMINAL |
| First End Spline Length | 0.854 INCHES NOMINAL IN |
| First End Spline Quantity | 16 |
| First End Spline Minor Diameter | 0.7500 INCHES MINIMUM AND 0.7550 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| DS-937978 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 70654-23801-102 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 937978 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| Reference | Meaning |
|---|---|
| 937978 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-339-7507 is a Shaft,shouldered, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-339-7507 has 3 manufacturer part numbers on file: DS-937978 (Eaton Aerospace, Llc Dba Jackson South), 70654-23801-102 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 937978 (Eaton Aerospace, Llc Dba Jackson South).
Key specifications for DS-937978: First End Pitch Diameter: 0.8000 INCHES NOMINAL IN; Step Quantity: 1; First End Diameter: 0.6928 INCHES NOMINAL IN; First End Spline Major Diameter: 0.8900 INCHES MINIMUM AND 0.8997 INCHES MAXIMUM IN. 10 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.