National Filter
The National Filter NFI-25SK is a 25µm hydraulic filter element. It measures 3.89" OD x 1.6" ID x 9.25" long. 3 verified cross-references are available from aftermarket manufacturers.
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3 Cross-References Available
See which OEM filters this product replaces.
Technical specifications for the National Filter NFI-25SK filter element. Data sourced from manufacturer catalogs and verified against OEM documentation.
| Specification | Value |
|---|---|
| Performance | |
| Micron Rating | 25µm |
| Media Type | Pending verification |
| Efficiency (ISO 16889) | Pending verification |
| Collapse Rating | Pending verification |
| Dimensions | |
| O.D. (inches) | 3.89" |
| I.D. (inches) | 1.6" |
| O.A.L. (inches) | 9.25" |
| Seal Material | Pending verification |
Last verified: February 2026
3 verified replacements available from Hy-Pro, Swift Filters, TTI
All cross-references are reviewed for dimensional and performance compatibility. Enter your info below to receive the full cross-reference report.
The NATIONAL FILTER NFI-25SK is designed for use in hydraulic and lubrication filtration systems. With a 25µm rating, this element is suitable for pump and component protection in industrial hydraulic circuits.
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