The Shaft,shouldered, cataloged under National Stock Number 3040-01-416-1663, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-416-1663 |
| Primary Part Number | 211081688 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 2 |
| First End Diameter | 0.7450 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Second End Diameter | 0.6300 INCHES MINIMUM AND 0.6500 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.7450 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Second End Spline Minor Diameter | 0.5190 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Spline Major Diameter | 0.6300 INCHES MINIMUM AND 0.6500 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM-A331 ASSN STD SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 12 |
| Second End Pressure Angle | 30.0 DEGREES NOMINAL |
| Second End Style | SPLINED (INVOLUTE) |
| Material | STEEL |
| Second End Pitch Diameter | 0.6000 INCHES NOMINAL IN |
| Second End Spline Length | 3.500 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 |
|---|---|
| 564-6409340-11 | Naval Sea Systems Command (USA) |
| 211081688 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6409340 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-416-1663 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-416-1663 has 2 manufacturer part numbers on file: 564-6409340-11 (Naval Sea Systems Command), 211081688 (Naval Sea Systems Command).
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-416-6861, 4820-01-417-1269, 4820-01-417-1321. Verify interchangeability with system specifications before substitution.
Key specifications for 211081688: Surface Finish: 125.0 MICROINCHES; Step Quantity: 2; First End Diameter: 0.7450 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Second End Diameter: 0.6300 INCHES MINIMUM AND 0.6500 INCHES MAXIMUM 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.