The Shaft,shouldered, cataloged under National Stock Number 3040-00-770-0339, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-770-0339 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 40.0 MICROINCHES |
| Step Quantity | 5 |
| First End Diameter | 0.2500 INCHES NOMINAL IN |
| Second End Diameter | 0.2500 INCHES NOMINAL IN |
| Largest Step Diameter | 0.311 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED |
| Second End Groove Diameter | 0.2310 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.323 INCHES NOMINAL IN |
| Second End Groove Width | 0.0280 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.874 INCHES MINIMUM AND 1.203 INCHES MAXIMUM IN |
| First End Groove Diameter | 0.2310 INCHES NOMINAL IN |
| Second End Style | TWO CIRCULAR GROOVES |
| Material | STEEL COMP 303 OR STEEL COMP 416 |
| First End Groove Width | 0.0280 INCHES NOMINAL IN |
| Second End Distance Between First and Second Groove Centers | 0.281 INCHES NOMINAL 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 |
|---|---|
| 23783 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-770-0339 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5940-01-333-9359. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-00-770-0339: Surface Finish: 40.0 MICROINCHES; Step Quantity: 5; First End Diameter: 0.2500 INCHES NOMINAL IN; Second End Diameter: 0.2500 INCHES NOMINAL IN. 16 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.