The Shaft,shouldered, cataloged under National Stock Number 3040-01-253-9426, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-253-9426 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 5 |
| First End Diameter | 0.3900 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN |
| First End Slot Width | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| First End Style | SLOTTED |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | IDENTICAL |
| First End Slot Depth | 0.060 INCHES NOMINAL IN |
| Material | STEEL COMP 304 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SS-472-2477292 | D/9 Drawing number reference only Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
| SS-472-2477292-41 | 3/9 Design control — primary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
NSN 3040-01-253-9426 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-288-5310. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-253-9426: Step Quantity: 5; First End Diameter: 0.3900 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN; Largest Step Diameter: 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN; First End Slot Width: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN. 9 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.