The Shaft,shouldered, cataloged under National Stock Number 3040-00-138-0643, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-00-138-0643 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES |
| Second End Hole Diameter | 0.0460 INCHES MINIMUM AND 0.0470 INCHES MAXIMUM IN |
| Step Quantity | 6 |
| First End Diameter | 0.1860 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN |
| Second End Diameter | 0.1550 INCHES NOMINAL IN |
| Largest Step Diameter | 0.250 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Distance From Hole Center to End | 0.390 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | UNTHREADED CROSS DRILLED |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| 738645-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-138-0643 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-138-0643: Surface Finish: 16.0 MICROINCHES; Second End Hole Diameter: 0.0460 INCHES MINIMUM AND 0.0470 INCHES MAXIMUM IN; Step Quantity: 6; First End Diameter: 0.1860 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN. 11 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.