The Shaft,shouldered, cataloged under National Stock Number 3040-01-321-4490, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-321-4490 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Second End Flat Length | 0.1560 INCHES NOMINAL IN |
| Step Quantity | 5 |
| First End Diameter | 0.6250 INCHES NOMINAL IN |
| Second End Diameter | 0.6250 INCHES NOMINAL IN |
| Largest Step Diameter | 0.813 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| First End Internal Thread Length | 0.5000 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.0940 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLATTED AND INTERNALLY THREADED |
| Material | STEEL COMP 303 |
| Second End Internal Thread Length | 0.5000 INCHES NOMINAL IN |
| External Keyway Length | 0.821 INCHES NOMINAL FIRST END IN |
| Second End Flat Depth | 0.0810 INCHES NOMINAL IN |
| First End Keyway Width | 0.1880 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 |
| Reference | Meaning |
|---|---|
| PL-30451-01 ITEM 5 | 5/2 Secondary reference U.S. Government activity |
| 65889-01 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 65889 | D/9 Drawing number reference only U.S. Government activity |
| B65889-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-321-4490 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5136-01-727-4168. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-321-4490: Second End Flat Length: 0.1560 INCHES NOMINAL IN; Step Quantity: 5; First End Diameter: 0.6250 INCHES NOMINAL IN; Second End Diameter: 0.6250 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.