The Shaft,shouldered, cataloged under National Stock Number 3040-00-508-4655, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 18 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 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 | 3040-00-508-4655 |
| Primary Part Number | 143808 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Second End Grooved Flat Length | 0.5000 INCHES NOMINAL IN |
| Step Quantity | 5 |
| First End Diameter | 0.6280 INCHES NOMINAL IN |
| Second End Distance From End to Flat | 0.250 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.6310 INCHES NOMINAL IN |
| Second End Diameter | 0.7480 INCHES NOMINAL IN |
| Largest Step Diameter | 0.968 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 0.500 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Second End Keyway Width | 0.1863 INCHES MINIMUM AND 0.1880 INCHES MAXIMUM IN |
| First End Spline Length | 0.688 INCHES NOMINAL IN |
| First End Spline Quantity | 12 |
| End Similarity | NOT IDENTICAL |
| Second End Grooved Flat Depth | 0.029 INCHES NOMINAL IN |
| Second End Style | FLAT GROOVE AND WOODRUFF KEYWAY |
| First End Spline Minor Diameter | 0.5400 INCHES MINIMUM AND 0.5500 INCHES MAXIMUM IN |
| Material | STEEL |
| External Keyway Length | 0.750 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 |
|---|---|
| 143808 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 3040-00-508-4655 is a Shaft,shouldered, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-508-4655 has 1 manufacturer part number on file: 143808 (Eaton Aerospace, Llc Dba Jackson South).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-239-3831. Verify interchangeability with system specifications before substitution.
Key specifications for 143808: Second End Grooved Flat Length: 0.5000 INCHES NOMINAL IN; Step Quantity: 5; First End Diameter: 0.6280 INCHES NOMINAL IN; Second End Distance From End to Flat: 0.250 INCHES NOMINAL IN. 18 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.