The Shaft,shouldered, cataloged under National Stock Number 3040-01-396-1529, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-396-1529 |
| Primary Part Number | 803-6397421 PC 20 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Second End Hole Diameter | 0.1875 INCHES NOMINAL IN |
| Step Quantity | 4 |
| First End Diameter | 0.3750 INCHES NOMINAL IN |
| Second End Diameter | 0.4360 INCHES NOMINAL IN |
| Largest Step Diameter | 0.750 INCHES NOMINAL IN |
| First End External Thread Length | 0.719 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| Material Document and Classification | ASTM-A-276 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 0.281 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | UNTHREADED CROSS DRILLED |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 803-6397421 PC 20 PRIMARY | Naval Sea Systems Command (USA) |
| 6397421 PC 20 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6397421 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-396-1529 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-396-1529 has 2 manufacturer part numbers on file: 803-6397421 PC 20 (Naval Sea Systems Command), 6397421 PC 20 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-396-1532. Verify interchangeability with system specifications before substitution.
Key specifications for 803-6397421 PC 20: Second End Hole Diameter: 0.1875 INCHES NOMINAL IN; Step Quantity: 4; First End Diameter: 0.3750 INCHES NOMINAL IN; Second End Diameter: 0.4360 INCHES NOMINAL IN. 12 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.