The Shaft,shouldered, cataloged under National Stock Number 3040-01-446-6397, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-446-6397 |
| Primary Part Number | 123-4403552 PC 4SS |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 7 |
| First End Diameter | 0.7500 INCHES NOMINAL IN |
| Second End Diameter | 1.0000 INCHES NOMINAL IN |
| Largest Step Diameter | 2.0000 INCHES NOMINAL IN |
| First End External Thread Length | 0.8375 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 1.4925 INCHES NOMINAL IN |
| First End Style | EXTERNALLY AND INTERNALLY THREADED |
| Second End Keyway Width | 0.1875 INCHES NOMINAL IN |
| First End Internal Thread Length | 0.5312 INCHES NOMINAL IN |
| Material Document and Classification | 11-N-281,CL A HF FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | WOODRUFF KEYWAY AND INTERNALLY THREADED |
| Material | NICKEL ALLOY |
| Second End Internal Thread Length | 0.2500 INCHES NOMINAL IN |
| External Keyway Length | 0.7500 INCHES NOMINAL SECOND END 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 |
|---|---|
| 123-4403552 PC 4SS | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 1502-96 FN 4 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4403552 PC 4 | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4403552 | D/9 Drawing number reference only U.S. Government activity |
| 123-4403552 PC 4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-446-6397 is a Shaft,shouldered, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-446-6397 has 1 manufacturer part number on file: 123-4403552 PC 4SS (Naval Inventory Control Point Mechanicsburg).
5 possible matches (shared part number, not a government interchangeability claim): 3040-01-446-6418, 3040-01-446-6422, 3020-01-446-8433. Verify interchangeability with system specifications before substitution.
Key specifications for 123-4403552 PC 4SS: Surface Finish: 63.0 MICROINCHES; Step Quantity: 7; First End Diameter: 0.7500 INCHES NOMINAL IN; Second End Diameter: 1.0000 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.