The Shaft,shouldered, cataloged under National Stock Number 3040-01-413-8913, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-413-8913 |
| Primary Part Number | 845-6556524 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Second End External Thread Length | 0.5410 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Second End Diameter | 0.7810 INCHES NOMINAL IN |
| Largest Step Diameter | 1.000 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.1880 INCHES MINIMUM AND 0.2030 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A-434BC ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.7320 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.047 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.0800 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.541 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED FLAT KEYWAY AND EXTERNALLY THREADED |
| Material | STEEL COMP 4140 OR STEEL COMP 4142 |
| External Keyway Length | 0.690 INCHES MINIMUM AND 0.750 INCHES MAXIMUM 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 |
|---|---|
| 845-6603141-75 | Naval Sea Systems Command (USA) |
| 845-6556524 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3040-01-413-8913 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-413-8913 has 2 manufacturer part numbers on file: 845-6603141-75 (Naval Sea Systems Command), 845-6556524 (Naval Sea Systems Command).
Key specifications for 845-6556524: Second End External Thread Length: 0.5410 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Second End Diameter: 0.7810 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.