The Shaft,shouldered, cataloged under National Stock Number 3040-01-220-0971, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-220-0971 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| Step Quantity | 5 |
| First End Diameter | 0.8105 INCHES NOMINAL IN |
| Second End Diameter | 0.9975 INCHES NOMINAL IN |
| Largest Step Diameter | 1.500 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.8515 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Spline Major Diameter | 0.9975 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281 CLASS A,HR FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 10 |
| Second End Style | SPLINED (STRAIGHT) |
| Material | NICKEL ALLOY |
| Second End Spline Length | 1.000 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 |
|---|---|
| 77656-31X11 PIECE 28 | 3/2 Design control — primary reference U.S. Government activity |
| SSN637-505-2143929 | D/9 Drawing number reference only U.S. Government activity |
| SSN637-505-2143929 PIECE 28 | 5/2 Secondary reference U.S. Government activity |
| 77656-31X11 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-220-0971 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-220-0971: Surface Finish: 32.0 MICROINCHES; Step Quantity: 5; First End Diameter: 0.8105 INCHES NOMINAL IN; Second End Diameter: 0.9975 INCHES NOMINAL IN. 14 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.