The Shaft,shouldered, cataloged under National Stock Number 3040-00-531-0660, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 13 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 | 3040-00-531-0660 |
| Primary Part Number | 5310660 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| FSC Application Data | MOUNT,MACHINE GUN,.50 CAL. |
| Step Quantity | 4 |
| First End Diameter | 0.5901 INCHES MINIMUM AND 0.5904 INCHES MAXIMUM IN |
| Second End Diameter | 0.5620 INCHES MINIMUM AND 0.5623 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.6245 INCHES MINIMUM AND 0.6248 INCHES MAXIMUM IN |
| Second End Distance From Keyway Center to End | 0.437 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.0627 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | WOODRUFF KEYWAY |
| Material | STEEL COMP 4140 |
| External Keyway Length | 0.612 INCHES NOMINAL SECOND END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5310660 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3040-00-531-0660 is a Shaft,shouldered, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-531-0660 has 1 manufacturer part number on file: 5310660 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 5310660: Surface Finish: 63.0 MICROINCHES; FSC Application Data: MOUNT,MACHINE GUN,.50 CAL.; Step Quantity: 4; First End Diameter: 0.5901 INCHES MINIMUM AND 0.5904 INCHES MAXIMUM IN. 13 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.
NSN 3040-00-531-0660 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.