The Shaft,shouldered, cataloged under National Stock Number 3040-00-404-9877, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-404-9877 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 4 |
| First End Diameter | 1.6390 INCHES NOMINAL IN |
| First End Spline Major Diameter | 1.6390 INCHES NOMINAL IN |
| Second End Diameter | 1.8600 INCHES NOMINAL IN |
| Largest Step Diameter | 1.937 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 1.8600 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Second End Spline Major Diameter | 1.6000 INCHES NOMINAL IN |
| First End Spline Length | 2.625 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 12 |
| Second End Style | SPLINED (STRAIGHT) |
| First End Spline Minor Diameter | 1.4450 INCHES NOMINAL IN |
| Material | STEEL COMP 1041 |
| Second End Spline Length | 2.562 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 |
|---|---|
| 36201-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-404-9877 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): 5840-01-112-6979. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-00-404-9877: Step Quantity: 4; First End Diameter: 1.6390 INCHES NOMINAL IN; First End Spline Major Diameter: 1.6390 INCHES NOMINAL IN; Second End Diameter: 1.8600 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.