The Shaft,shouldered, cataloged under National Stock Number 3040-01-122-5879, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-122-5879 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| Second End External Thread Length | 0.594 INCHES NOMINAL IN |
| Step Quantity | 9 |
| First End Diameter | 0.5833 INCHES NOMINAL IN |
| Second End Diameter | 0.6613 INCHES NOMINAL IN |
| Largest Step Diameter | 1.031 INCHES NOMINAL IN |
| First End External Thread Length | 0.375 INCHES NOMINAL IN |
| First End Style | EXTERNALLY THREADED AND FLAT KEYWAY |
| Second End Keyway Width | 0.1250 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-890,CLASS BS MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.078 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.078 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNALLY THREADED AND FLAT KEYWAY |
| Material | STEEL |
| External Keyway Length | 0.719 INCHES NOMINAL SECOND END IN |
| External Keyway Length | 0.469 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.1250 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 |
|---|---|
| 715J410-03 | 3/2 Design control — primary reference U.S. Government activity |
| 715J410 PIECE 3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 715J410 | D/9 Drawing number reference only U.S. Government activity |
| 635J642PC10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-122-5879 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3010-01-174-8940, 3040-01-176-0544. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-122-5879: Surface Finish: 32.0 MICROINCHES; Second End External Thread Length: 0.594 INCHES NOMINAL IN; Step Quantity: 9; First End Diameter: 0.5833 INCHES NOMINAL IN. 18 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.