The Shaft,shouldered, cataloged under National Stock Number 3040-01-138-0290, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-138-0290 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Second End Hole Diameter | 0.2420 INCHES MINIMUM AND 0.2480 INCHES MAXIMUM IN |
| Second End External Thread Length | 0.875 INCHES NOMINAL IN |
| Step Quantity | 4 |
| First End Diameter | 1.5000 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 0.907 INCHES MINIMUM AND 0.912 INCHES MAXIMUM IN |
| Second End Diameter | 0.7000 INCHES NOMINAL IN |
| Largest Step Diameter | 1.250 INCHES NOMINAL IN |
| First End Style | INDENTED FLAT KEYWAY |
| First End Keyway Depth | 0.207 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Second End Distance From Hole Center to End | 0.292 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN |
| Second End Hole Depth | 0.186 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | CROSS DRILLED AND EXTERNALLY THREADED |
| External Keyway Length | 1.625 INCHES MINIMUM AND 1.635 INCHES MAXIMUM FIRST END IN |
| First End Keyway Width | 0.3750 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM 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 |
|---|---|
| 520-4674711 ITEM 4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-138-0290 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-138-0290: Surface Finish: 125.0 MICROINCHES; Second End Hole Diameter: 0.2420 INCHES MINIMUM AND 0.2480 INCHES MAXIMUM IN; Second End External Thread Length: 0.875 INCHES NOMINAL IN; Step Quantity: 4. 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.