The Shaft,shouldered, cataloged under National Stock Number 3040-01-139-1612, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-139-1612 |
| Primary Part Number | 609-4676626 ITEM 5 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 5 |
| First End Diameter | 0.7475 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.7475 INCHES NOMINAL IN |
| Second End Diameter | 1.0000 INCHES NOMINAL IN |
| Second End Step Length | 1.000 INCHES NOMINAL IN |
| Largest Step Diameter | 1.500 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | QQ-N-286 CL A FED SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 0.325 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| First End Spline Minor Diameter | 0.6215 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Second End Width Across Flats | 0.750 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 |
| Part Number | Manufacturer |
|---|---|
| 609-4676626 ITEM 5 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 609-4676626 | D/9 Drawing number reference only U.S. Government activity |
| 87577-3306 ITEM 5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-139-1612 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-139-1612 has 1 manufacturer part number on file: 609-4676626 ITEM 5 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-154-0356, 3040-01-228-1083. Verify interchangeability with system specifications before substitution.
Key specifications for 609-4676626 ITEM 5: Surface Finish: 63.0 MICROINCHES; Step Quantity: 5; First End Diameter: 0.7475 INCHES NOMINAL IN; First End Spline Major Diameter: 0.7475 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.