The Filter Element,fluid, cataloged under National Stock Number 2945-01-522-4590, is classified within Federal Supply Class 2945 (Engine Air and Oil Filters, Cleaners, Aircraft Prime Moving) of the Engine Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2945-01-522-4590 |
| Item Name | Filter Element,fluid |
| FSC / FSG | 2945 / 29 — Engine Air and Oil Filters, Cleaners, Aircraft Prime Moving |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND |
| 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 |
|---|---|
| 4951542 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2945-01-522-4590 is a Filter Element,fluid, classified under FSC 2945, Engine Air and Oil Filters, Cleaners, Aircraft Prime Moving. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2945-01-524-6623. Verify interchangeability with system specifications before substitution.
Key specifications for 2945-01-522-4590: Thread Direction: RIGHT-HAND; Special Features: FOR GEARBOX ASSEMBLY. 1 specification is 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.