The Shaft,shouldered, cataloged under National Stock Number 3040-01-449-2740, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-449-2740 |
| Primary Part Number | 167-6404610-64 |
| 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 | 3.0000 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 3.2930 INCHES NOMINAL IN |
| Second End Diameter | 4.5000 INCHES NOMINAL IN |
| Second End Step Length | 0.7515 INCHES NOMINAL IN |
| Largest Step Diameter | 4.5000 INCHES NOMINAL IN |
| First End Style | INDENTED FLAT KEYWAY |
| Material Document and Classification | QQ-N-286, FORM 2, COND ANL FED SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.4310 INCHES NOMINAL IN |
| Second End Tongue Width | 4.5000 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Tongue Thickness | 1.5080 INCHES NOMINAL IN |
| Second End Style | TONGUE ROUNDED ENDS |
| Material | NICKEL ALLOY |
| External Keyway Length | 3.7650 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.7510 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 |
|---|---|
| 167-6404610-64 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6404610 | D/9 Drawing number reference only Naval Sea Systems Command |
| DF1502-238 FIND 64 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3040-01-449-2740 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-449-2740 has 1 manufacturer part number on file: 167-6404610-64 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-451-9721. Verify interchangeability with system specifications before substitution.
Key specifications for 167-6404610-64: Step Quantity: 4; First End Diameter: 3.0000 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 3.2930 INCHES NOMINAL IN; Second End Diameter: 4.5000 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.