The Shaft,shouldered, cataloged under National Stock Number 3040-01-218-4144, 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14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-218-4144 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 2 |
| First End Diameter | 0.3120 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN |
| Second End Diameter | 0.2120 INCHES MINIMUM AND 0.2140 INCHES MAXIMUM IN |
| Second End Step Length | 0.3900 INCHES NOMINAL IN |
| Largest Step Diameter | 0.313 INCHES NOMINAL IN |
| First End Style | INTERNAL THREADED |
| First End Internal Thread Length | 0.7700 INCHES NOMINAL IN |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Tongue Width | 0.2130 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Tongue Thickness | 0.1200 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN |
| Second End Style | TONGUE ROUNDED ENDS |
| Material | STEEL |
| 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 |
|---|---|
| 3825056 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-218-4144 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-218-4144: Surface Finish: 125.0 MICROINCHES; Step Quantity: 2; First End Diameter: 0.3120 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN; Second End Diameter: 0.2120 INCHES MINIMUM AND 0.2140 INCHES MAXIMUM 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.