The Shaft,shouldered, cataloged under National Stock Number 3040-00-679-4375, 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13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-679-4375 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 3 |
| First End Diameter | 0.1869 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM IN |
| First End Flat Depth | 0.0310 INCHES NOMINAL IN |
| Second End Diameter | 0.3120 INCHES NOMINAL IN |
| Largest Step Diameter | 0.312 INCHES NOMINAL IN |
| First End Style | FLATTED |
| Material Document and Classification | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 0.125 INCHES NOMINAL IN |
| Second End Hole Depth | 0.112 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | THREADED CROSS DRILLED |
| First End Flat Length | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| SM-B-344632 | 3/2 Design control — primary reference U.S. Government activity |
| B344632 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-00-679-4375 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-679-4375: Step Quantity: 3; First End Diameter: 0.1869 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM IN; First End Flat Depth: 0.0310 INCHES NOMINAL IN; Second End Diameter: 0.3120 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.
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.