The Shaft,shouldered, cataloged under National Stock Number 3040-01-220-0972, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-220-0972 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 5 |
| First End Diameter | 2.4960 INCHES NOMINAL IN |
| Second End Diameter | 2.2500 INCHES NOMINAL IN |
| Largest Step Diameter | 3.244 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED AND INTERNALLY THREADED |
| First End Internal Thread Length | 10.625 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 1.125 INCHES NOMINAL IN |
| Second End Hole Depth | 0.625 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 1.375 INCHES NOMINAL IN |
| First End Groove Diameter | 2.4020 INCHES NOMINAL IN |
| Second End Style | CROSS DRILLED HOLE AND INTERNALLY THREADED |
| Material | NICKEL ALLOY |
| First End Groove Width | 0.1880 INCHES NOMINAL IN |
| Second End Internal Thread Length | 10.375 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 |
| Reference | Meaning |
|---|---|
| SSN593-520-1862096 PIECE 10 | 3/2 Design control — primary reference U.S. Government activity |
| SSN593-520-1862096 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-220-0972 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5340-01-220-5562, 3040-01-220-6702, 3950-01-220-6744. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-220-0972: Surface Finish: 63.0 MICROINCHES; Step Quantity: 5; First End Diameter: 2.4960 INCHES NOMINAL IN; Second End Diameter: 2.2500 INCHES NOMINAL IN. 17 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.