The Shaft,shouldered, cataloged under National Stock Number 3040-00-399-5263, 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 11 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-399-5263 |
| Primary Part Number | 28085 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Step Quantity | 6 |
| First End Diameter | 0.5940 INCHES NOMINAL IN |
| Second End Diameter | 1.5000 INCHES NOMINAL IN |
| Largest Step Diameter | 1.750 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.3750 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.188 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAY |
| Material | STEEL |
| External Keyway Length | 1.406 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 |
|---|---|
| 28085 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 28085 | Reidville Hydraulics & Mfg Inc (USA) |
| Reference | Meaning |
|---|---|
| CR57877PC57 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR70290PC274 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR84535PC56 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR70289PC274 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR79551PC56 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR57878PC57 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR84534PC56 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| CR79552PC56 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
NSN 3040-00-399-5263 is a Shaft,shouldered, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-399-5263 has 2 manufacturer part numbers on file: 28085 (Eaton Aerospace, Llc Dba Jackson South), 28085 (Reidville Hydraulics & Mfg Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5935-00-949-9606, 4930-01-092-2641, 4710-01-182-4597. Verify interchangeability with system specifications before substitution.
Key specifications for 28085: Step Quantity: 6; First End Diameter: 0.5940 INCHES NOMINAL IN; Second End Diameter: 1.5000 INCHES NOMINAL IN; Largest Step Diameter: 1.750 INCHES NOMINAL IN. 11 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.