The Shaft,shouldered, cataloged under National Stock Number 3040-01-335-7299, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-335-7299 |
| Primary Part Number | 937979 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Step Quantity | 4 |
| First End Diameter | 0.7400 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.5200 INCHES NOMINAL IN |
| Second End Diameter | 0.3280 INCHES NOMINAL IN |
| Largest Step Diameter | 0.740 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| First End Spline Length | 1.093 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | PLAIN |
| First End Spline Minor Diameter | 0.4000 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 937979 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| Reference | Meaning |
|---|---|
| 937979 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3040-01-335-7299 is a Shaft,shouldered, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-335-7299 has 1 manufacturer part number on file: 937979 (Eaton Aerospace, Llc Dba Jackson South).
Key specifications for 937979: Step Quantity: 4; First End Diameter: 0.7400 INCHES NOMINAL IN; First End Spline Major Diameter: 0.5200 INCHES NOMINAL IN; Second End Diameter: 0.3280 INCHES NOMINAL IN. 11 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.