The Shaft,shouldered, cataloged under National Stock Number 3040-01-475-9523, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-475-9523 |
| Primary Part Number | 124-4322623 PC 37 |
| 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 | 0.6250 INCHES NOMINAL IN |
| Second End Diameter | 1.1250 INCHES NOMINAL IN |
| Largest Step Diameter | 1.125 INCHES NOMINAL IN |
| First End External Thread Length | 0.875 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 2.063 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| Second End Keyway Width | 0.3125 INCHES NOMINAL IN |
| Material Document and Classification | AISI-C-1018 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Keyway Depth | 0.156 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | INDENTED FLAT KEYWAY |
| Material | STEEL COMP 1018 |
| External Keyway Length | 1.750 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 |
|---|---|
| 124-4322623 PC 37 PRIMARY | Naval Sea Systems Command (USA) |
| 124-4322621 PC 58 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 4322621 | D/9 Drawing number reference only Naval Sea Systems Command |
| 4322623 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-475-9523 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-475-9523 has 2 manufacturer part numbers on file: 124-4322623 PC 37 (Naval Sea Systems Command), 124-4322621 PC 58 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-475-9535, 3020-01-475-9628, 3020-01-475-9632. Verify interchangeability with system specifications before substitution.
Key specifications for 124-4322623 PC 37: Surface Finish: 125.0 MICROINCHES; Step Quantity: 2; First End Diameter: 0.6250 INCHES NOMINAL IN; Second End Diameter: 1.1250 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.