The Shaft,shouldered, cataloged under National Stock Number 3040-00-690-9043, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-690-9043 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Second End External Thread Length | 0.562 INCHES NOMINAL IN |
| Step Quantity | 6 |
| First End Diameter | 1.0000 INCHES NOMINAL IN |
| Second End Diameter | 0.8750 INCHES NOMINAL IN |
| Largest Step Diameter | 1.625 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 1.062 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.2500 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNALLY THREADED AND WOODRUFF KEYWAY |
| Material | STEEL CORROSION RESISTING |
| External Keyway Length | 0.875 INCHES NOMINAL SECOND END 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 |
|---|---|
| 27964 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-690-9043 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): 4820-01-429-5985. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-00-690-9043: Second End External Thread Length: 0.562 INCHES NOMINAL IN; Step Quantity: 6; First End Diameter: 1.0000 INCHES NOMINAL IN; Second End Diameter: 0.8750 INCHES NOMINAL IN. 12 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.