The Shaft,shouldered, cataloged under National Stock Number 3040-01-504-0772, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-504-0772 |
| Primary Part Number | 124-6938645 PART 207 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Second End External Thread Length | 1.125 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 0.08750 INCHES NOMINAL IN |
| Second End Diameter | 0.7490 INCHES NOMINAL IN |
| Largest Step Diameter | 1.0000 INCHES MAXIMUM IN |
| Second End Distance From Keyway Center to End | 1.312 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.2510 INCHES NOMINAL IN |
| Second End Groove Diameter | 0.7187 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.1875 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 1.125 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED WOODRUFF KEYWAY AND EXTERNALLY THREADED |
| Material | STEEL |
| External Keyway Length | 2.405 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 |
|---|---|
| 124-6938645 PART 207 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6938645 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-504-0772 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-504-0772 has 1 manufacturer part number on file: 124-6938645 PART 207 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3120-01-504-0788, 3040-01-504-4839. Verify interchangeability with system specifications before substitution.
Key specifications for 124-6938645 PART 207: Second End External Thread Length: 1.125 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 0.08750 INCHES NOMINAL IN; Second End Diameter: 0.7490 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.