The Shaft,shouldered, cataloged under National Stock Number 3040-01-280-4122, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-01-280-4122 |
| Primary Part Number | 72D225612-2373 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Step Quantity | 3 |
| First End Diameter | 0.3800 INCHES NOMINAL IN |
| First End Step Length | 0.640 INCHES NOMINAL IN |
| Second End Diameter | 0.3800 INCHES NOMINAL IN |
| Second End Step Length | 0.265 INCHES NOMINAL IN |
| Largest Step Diameter | 0.999 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| First End Angle Between Flats | 180.0 DEGREES NOMINAL |
| First End Style | TWO FLATS |
| Second End Angle Between Flats | 180.0 DEGREES NOMINAL |
| End Similarity | NOT IDENTICAL |
| Second End Style | TWO FLATS |
| Material | STEEL COMP 303SE |
| 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 |
|---|---|
| 72D225612-2373 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 72D225612 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 3040-01-280-4122 is a Shaft,shouldered, manufactured by The Boeing Company Div Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-280-4122 has 1 manufacturer part number on file: 72D225612-2373 (The Boeing Company Div Defense).
Key specifications for 72D225612-2373: Step Quantity: 3; First End Diameter: 0.3800 INCHES NOMINAL IN; First End Step Length: 0.640 INCHES NOMINAL IN; Second End Diameter: 0.3800 INCHES NOMINAL IN. 12 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.