The Shaft,shouldered, cataloged under National Stock Number 3040-01-109-4178, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-01-109-4178 |
| Primary Part Number | 123149D |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Surface Finish | 10.0 MICROINCHES |
| Step Quantity | 8 |
| First End Diameter | 0.7875 INCHES MINIMUM AND 0.7878 INCHES MAXIMUM IN |
| Second End Diameter | 1.7718 INCHES MINIMUM AND 1.7722 INCHES MAXIMUM IN |
| Largest Step Diameter | 2.216 INCHES MINIMUM AND 2.221 INCHES MAXIMUM IN |
| First End Style | PLAIN |
| End Similarity | NOT IDENTICAL |
| Second End Style | INTERNAL THREADED |
| Material | STEEL COMP 4340 |
| Second End Internal Thread Length | 0.750 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 |
|---|---|
| 123149D PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 123149D | 5/9 Secondary reference Oshkosh Corp |
NSN 3040-01-109-4178 is a Shaft,shouldered, manufactured by Oshkosh Defense Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-109-4178 has 1 manufacturer part number on file: 123149D (Oshkosh Defense Llc).
Key specifications for 123149D: Surface Finish: 10.0 MICROINCHES; Step Quantity: 8; First End Diameter: 0.7875 INCHES MINIMUM AND 0.7878 INCHES MAXIMUM IN; Second End Diameter: 1.7718 INCHES MINIMUM AND 1.7722 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.