The Washer,keyway, cataloged under National Stock Number 5310-01-025-1287, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 6 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 | 5310-01-025-1287 |
| Primary Part Number | 241541 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES OUTER |
| Outside Diameter | 2.497 INCHES MINIMUM AND 2.503 INCHES MAXIMUM IN |
| Internal Keyway Quantity | 2 |
| Features Provided | CASEHARDENED |
| Material Thickness | 0.025 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 241541 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 5310-01-025-1287 is a Washer,keyway, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-025-1287 has 1 manufacturer part number on file: 241541 (Eaton Aerospace, Llc Dba Jackson South).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-506-9598. Verify interchangeability with system specifications before substitution.
Key specifications for 241541: Surface Finish: 16.0 MICROINCHES OUTER; Outside Diameter: 2.497 INCHES MINIMUM AND 2.503 INCHES MAXIMUM IN; Internal Keyway Quantity: 2; Features Provided: CASEHARDENED. 6 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.