The Shaft,shouldered, cataloged under National Stock Number 3040-01-486-5220, 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 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-486-5220 |
| Primary Part Number | 122-6600338 PC 18 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Step Quantity | 4 |
| First End Diameter | 2.5000 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 2.1250 INCHES NOMINAL IN |
| Second End Diameter | 2.5000 INCHES NOMINAL IN |
| Second End Step Length | 2.2500 INCHES NOMINAL IN |
| Largest Step Diameter | 2.5000 INCHES NOMINAL IN |
| First End Style | INDENTED FLAT KEYWAY |
| Material Document and Classification | MIL-S-1222, TY1, GR B7 MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.2500 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | HEXAGONAL |
| Material | STEEL |
| Second End Width Across Flats | 2.1719 INCHES NOMINAL IN |
| External Keyway Length | 3.7500 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.3750 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 |
|---|---|
| 122-4497454 PC3 | Naval Sea Systems Command (USA) |
| 122-6600338 PC 18 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6600338 | D/9 Drawing number reference only Naval Sea Systems Command |
| 4497454 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-486-5220 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-486-5220 has 2 manufacturer part numbers on file: 122-4497454 PC3 (Naval Sea Systems Command), 122-6600338 PC 18 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 3120-01-486-9690, 3120-01-486-9691, 3120-01-486-9692. Verify interchangeability with system specifications before substitution.
Key specifications for 122-6600338 PC 18: Step Quantity: 4; First End Diameter: 2.5000 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 2.1250 INCHES NOMINAL IN; Second End Diameter: 2.5000 INCHES NOMINAL IN. 15 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.