The Shaft,shouldered, cataloged under National Stock Number 3040-01-021-6646, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-01-021-6646 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Second End Flat Length | 0.250 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 0.1550 INCHES NOMINAL IN |
| Second End Diameter | 0.1600 INCHES NOMINAL IN |
| Largest Step Diameter | 0.250 INCHES NOMINAL IN |
| First End Style | FLATTED |
| Material Document and Classification | QQ-S-764,COND T FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.1080 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.0600 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.690 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND FLATTED |
| First End Flat Length | 0.343 INCHES NOMINAL IN |
| Material | STEEL COMP 416 |
| 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 |
|---|---|
| 1628321 | D/9 Drawing number reference only U.S. Government activity |
| 1628321-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-021-6646 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-021-6646: Second End Flat Length: 0.250 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 0.1550 INCHES NOMINAL IN; Second End Diameter: 0.1600 INCHES NOMINAL IN. 14 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.