The Shaft,shouldered, cataloged under National Stock Number 3040-00-451-6681, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-00-451-6681 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 9 |
| First End Diameter | 3.3475 INCHES MINIMUM AND 3.3484 INCHES MAXIMUM IN |
| First End Spline Major Diameter | 3.2450 INCHES MINIMUM AND 3.2500 INCHES MAXIMUM IN |
| Second End Diameter | 3.3475 INCHES MINIMUM AND 3.3484 INCHES MAXIMUM IN |
| Largest Step Diameter | 4.058 INCHES MINIMUM AND 4.063 INCHES MAXIMUM IN |
| Second End Spline Minor Diameter | 3.0510 INCHES MINIMUM AND 3.0620 INCHES MAXIMUM IN |
| First End Style | CIRCULAR GROOVED AND SPLINED (STRAIGHT) |
| Second End Spline Major Diameter | 3.2450 INCHES MINIMUM AND 3.2500 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM-A513 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A519 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 3.0700 INCHES MINIMUM AND 3.0820 INCHES MAXIMUM IN |
| First End Spline Length | 1.538 INCHES NOMINAL IN |
| First End Spline Quantity | 51 |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 2.728 INCHES MINIMUM AND 2.738 INCHES MAXIMUM IN |
| Second End Spline Quantity | 51 |
| Second End Groove Width | 0.1030 INCHES MINIMUM AND 0.1080 INCHES MAXIMUM IN |
| Second End Distance From End to Groove | 2.958 INCHES NOMINAL IN |
| First End Groove Diameter | 3.0700 INCHES MINIMUM AND 3.0820 INCHES MAXIMUM IN |
| Second End Style | CIRCULAR GROOVED AND SPLINED (STRAIGHT) |
| First End Spline Minor Diameter | 3.0510 INCHES MINIMUM AND 3.0620 INCHES MAXIMUM IN |
| Material | STEEL |
| First End Groove Width | 0.1030 INCHES MINIMUM AND 0.1080 INCHES MAXIMUM IN |
| Second End Spline Length | 1.868 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2587650 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-451-6681 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-451-6681: Surface Finish: 63.0 MICROINCHES; Step Quantity: 9; First End Diameter: 3.3475 INCHES MINIMUM AND 3.3484 INCHES MAXIMUM IN; First End Spline Major Diameter: 3.2450 INCHES MINIMUM AND 3.2500 INCHES MAXIMUM IN. 24 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.
NSN 3040-00-451-6681 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.