The Shaft,shouldered, cataloged under National Stock Number 3040-01-248-9821, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-248-9821 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| First End Pitch Diameter | 0.4000 INCHES NOMINAL IN |
| Step Quantity | 6 |
| First End Diameter | 0.4500 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.4500 INCHES NOMINAL IN |
| Largest Step Diameter | 4.749 INCHES NOMINAL IN |
| First End Style | SPLINED (INVOLUTE) |
| Material Document and Classification | MIL-S-46850,TYPE III MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Pressure Angle | 30.0 DEGREES NOMINAL |
| First End Spline Length | 0.563 INCHES NOMINAL IN |
| First End Spline Quantity | 8 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 0.3000 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5000263 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-248-9821 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): 4820-01-259-1589. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-248-9821: First End Pitch Diameter: 0.4000 INCHES NOMINAL IN; Step Quantity: 6; First End Diameter: 0.4500 INCHES NOMINAL IN; First End Spline Major Diameter: 0.4500 INCHES NOMINAL IN. 13 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.
NSN 3040-01-248-9821 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.