The Shaft,shouldered, cataloged under National Stock Number 3040-01-208-3106, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-208-3106 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 3 |
| First End Diameter | 0.9975 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.9975 INCHES NOMINAL IN |
| Second End Diameter | 0.9975 INCHES NOMINAL IN |
| Second End Step Length | 1.0000 INCHES NOMINAL IN |
| Largest Step Diameter | 1.247 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 2.000 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| First End Spline Minor Diameter | 0.8515 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Second End Width Across Flats | 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 |
| Reference | Meaning |
|---|---|
| 609-2127812 | D/9 Drawing number reference only U.S. Government activity |
| 609-2127812 PIECE 7 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3040-01-208-3106 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-208-7104. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-208-3106: Surface Finish: 63.0 MICROINCHES; Step Quantity: 3; First End Diameter: 0.9975 INCHES NOMINAL IN; First End Spline Major Diameter: 0.9975 INCHES NOMINAL IN. 16 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.