The Shaft,shouldered, cataloged under National Stock Number 3040-01-646-5639, 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 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-646-5639 |
| Primary Part Number | 588-7666739 ITEM 10 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Step Quantity | 2 |
| First End Diameter | 0.656 INCHES NOMINAL IN |
| Second End Diameter | 0.668 INCHES NOMINAL IN |
| Largest Step Diameter | 0.668 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED |
| Material Document and Classification | ASTM A276, TY 304, COND B, CF ASSN STD SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.250 INCHES NOMINAL IN |
| First End Groove Diameter | 0.438 INCHES NOMINAL IN |
| Second End Style | PLAIN |
| Material | STEEL COMP 304 |
| First End Groove Width | 0.250 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 |
|---|---|
| 588-7666739 ITEM 10 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3040-01-646-5639 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-646-5639 has 1 manufacturer part number on file: 588-7666739 ITEM 10 (Naval Sea Systems Command).
Key specifications for 588-7666739 ITEM 10: Step Quantity: 2; First End Diameter: 0.656 INCHES NOMINAL IN; Second End Diameter: 0.668 INCHES NOMINAL IN; Largest Step Diameter: 0.668 INCHES NOMINAL IN. 12 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.