The Shaft,shouldered, cataloged under National Stock Number 3040-01-148-7401, 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13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-01-148-7401 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Second End External Thread Length | 0.250 INCHES NOMINAL IN |
| Step Quantity | 4 |
| First End Diameter | 0.3122 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN |
| Second End Diameter | 0.2500 INCHES NOMINAL IN |
| Largest Step Diameter | 0.438 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Material Document and Classification | QQ-S-764 COND 1/A FED SPEC ALL MATERIAL RESPONSES |
| Second End Groove Diameter | 0.1820 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.0937 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.250 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Material | STEEL COMP 303 |
| 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 |
|---|---|
| 8-52-173 | 5/9 Secondary reference Illinois Tool Wks Inc Linac Div |
| 8-52-173 | 3/9 Design control — primary reference Itw Heartland Components Inc |
NSN 3040-01-148-7401 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-148-7401: Second End External Thread Length: 0.250 INCHES NOMINAL IN; Step Quantity: 4; First End Diameter: 0.3122 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN; Second End Diameter: 0.2500 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.