The Shaft,shouldered, cataloged under National Stock Number 3040-01-497-0625, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-497-0625 |
| Primary Part Number | 754-7066812-4 |
| 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 | 4.0010 INCHES MINIMUM AND 4.0030 INCHES MAXIMUM IN |
| Second End Diameter | 5.0000 INCHES MINIMUM AND 5.0010 INCHES MAXIMUM IN |
| Largest Step Diameter | 5.992 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 5.1300 INCHES MINIMUM AND 5.1470 INCHES MAXIMUM IN |
| First End Style | INTERNAL THREADED |
| Second End Spline Major Diameter | 5.9890 INCHES MINIMUM AND 5.9920 INCHES MAXIMUM IN |
| First End Internal Thread Length | 2.500 INCHES MINIMUM AND 2.620 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM-B446 NATIONAL SPEC ALL MATERIAL RESPONSES |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 9 |
| Second End Style | SPLINED (STRAIGHT) |
| Material | NICKEL ALLOY |
| Second End Spline Length | 11.528 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 |
|---|---|
| 754-7066812-4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H553-1502-4 | 5/2 Secondary reference U.S. Government activity |
| 754-7066812 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-497-0625 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-497-0625 has 1 manufacturer part number on file: 754-7066812-4 (Naval Sea Systems Command).
5 possible matches (shared part number, not a government interchangeability claim): 5365-01-497-1147, 3120-01-497-1949, 3120-01-497-1967. Verify interchangeability with system specifications before substitution.
Key specifications for 754-7066812-4: Step Quantity: 4; First End Diameter: 4.0010 INCHES MINIMUM AND 4.0030 INCHES MAXIMUM IN; Second End Diameter: 5.0000 INCHES MINIMUM AND 5.0010 INCHES MAXIMUM IN; Largest Step Diameter: 5.992 INCHES NOMINAL IN. 14 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.