The Shaft,shouldered, cataloged under National Stock Number 3040-01-688-0778, 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11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-688-0778 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 5 |
| First End Diameter | 3.080 INCHES MINIMUM AND 3.100 INCHES MAXIMUM IN |
| Second End Diameter | 3.770 INCHES MINIMUM AND 4.100 INCHES MAXIMUM IN |
| Largest Step Diameter | 5.880 INCHES MINIMUM AND 5.900 INCHES MAXIMUM IN |
| First End External Thread Length | 0.455 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Second End Distance From Hole Center to End | 2.820 INCHES MINIMUM AND 2.880 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| First End Groove Diameter | 2.623 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN |
| Second End Style | UNTHREADED CROSS DRILLED |
| First End Groove Width | 0.115 INCHES MINIMUM AND 0.135 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 |
|---|---|
| 413-10632 | D/9 Drawing number reference only U.S. Government activity |
| 413-10632-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-688-0778 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-688-0778: Step Quantity: 5; First End Diameter: 3.080 INCHES MINIMUM AND 3.100 INCHES MAXIMUM IN; Second End Diameter: 3.770 INCHES MINIMUM AND 4.100 INCHES MAXIMUM IN; Largest Step Diameter: 5.880 INCHES MINIMUM AND 5.900 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.