The Shaft,shouldered, cataloged under National Stock Number 3040-01-089-3090, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-089-3090 |
| Primary Part Number | 139C6928 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Second End Flat Length | 1.230 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 0.5000 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.5000 INCHES NOMINAL IN |
| Second End Diameter | 0.6230 INCHES NOMINAL IN |
| Largest Step Diameter | 0.623 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| First End Spline Length | 0.585 INCHES NOMINAL IN |
| First End Spline Quantity | 15 |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLATTED |
| First End Spline Minor Diameter | 0.3900 INCHES NOMINAL IN |
| Material | STEEL COMP 4140 |
| Second End Flat Depth | 0.0550 INCHES NOMINAL IN |
| 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 |
|---|---|
| 139C6928 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 3040-01-089-3090 is a Shaft,shouldered, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-089-3090 has 1 manufacturer part number on file: 139C6928 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 139C6928: Surface Finish: 125.0 MICROINCHES; Second End Flat Length: 1.230 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 0.5000 INCHES NOMINAL IN. 15 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.