20 µm
JPP20-457- 180 mesh/cm
- 457 mesh/inch
- 39 µm thread diameter
- Smaller clear opening than 25 µm
Exact 25 Micron Woven Construction
25 Micron Nylon Filter Mesh JPP25-399
INCE filtration 25 micron nylon filter mesh is an exact reference construction for fine woven surface filtration: 25 µm clear opening, 157 mesh/cm, 399 mesh/inch and 43 µm monofilament thread. It can be supplied as roll goods or reviewed for cut and fabricated mesh parts.
JPP25-39925 µm opening · 399 mesh/inch · 43 µm thread
Clear Opening25 µmExact listed construction
Mesh Count157 / cmReference table value
Mesh Count399 / inchReference table value
Thread Diameter43 µmNylon monofilament
Reference Width127 cmTable reference width
Quick Answer
25 Micron Nylon Filter Mesh at a Glance
25 micron nylon filter mesh is a fine woven monofilament screen used for defined-opening surface filtration and particle screening. INCE filtration reference JPP25-399 is listed at a 25 µm clear opening, 157 mesh/cm, 399 mesh/inch and 43 µm thread diameter. It can be supplied as roll goods or reviewed for cut pieces, filter discs, screens and drawing-based OEM parts.
Search and sourcing note: buyers may also describe this product as 25 micron nylon mesh, 25 µm nylon filter cloth, 25 micron nylon screen mesh or 399 mesh nylon filter mesh. For this INCE filtration construction, use JPP25-399 to avoid ambiguity because "399 mesh" is not a universal conversion for every nylon mesh.
Defined Woven Opening
What “25 Micron” Means in Nylon Filter Mesh
The 25 µm value describes the clear opening between adjacent monofilament threads in this woven reference construction. It is a geometric mesh opening, not an automatic absolute particle-retention guarantee.
01
Clear opening is the primary sizeJPP25-399 is listed with a 25 µm mesh opening. Use the opening together with mesh count and thread diameter when matching a replacement mesh.
02
399 mesh/inch alone is not enoughMesh count describes thread density. The 43 µm thread diameter is also needed to understand the woven geometry and to distinguish one construction from another.
03
Retention depends on the real processParticle shape, orientation, loading, flow conditions and the finished component can affect practical screening behavior. Validate critical retention requirements in the actual process.
25 micron vs 25 mesh: they are not the same measurement. "25 micron" describes a 25 µm clear aperture. "25 mesh" describes a mesh count and would represent a much coarser screen. For INCE filtration JPP25-399, the listed reference is 25 µm opening and 399 mesh/inch with 43 µm monofilament thread.
Exact Reference Construction
25 Micron Nylon Filter Mesh Specification
The values below come from the INCE filtration nylon monofilament mesh reference table. Final material grade, weave details, tolerance and production availability should be confirmed with the quotation.
| Product Code | Mesh Opening | Mesh Count / cm | Mesh Count / inch | Thread Diameter | Reference Width |
|---|---|---|---|---|---|
| JPP25-399 | 25 µm | 157 | 399 | 43 µm | 127 cm |
Material Family
The nylon filter mesh family is offered in PA6 / PA66 monofilament. The requested polymer grade and compatibility should be confirmed for the process liquid, operating temperature and cleaning method.
How to Match an Existing Mesh
For replacement work, use the product code when known. Otherwise send a physical sample, clear opening requirement, thread diameter, finished dimensions and process conditions so the mesh can be matched by construction rather than by micron number alone.
Important: the 127 cm value is the reference width shown in the specification table. Finished discs, cut pieces, tubes and other fabricated parts are specified by their own dimensions and drawing requirements.
Neighboring Exact Constructions
20 vs 25 vs 40 Micron Nylon Filter Mesh
These three exact reference constructions show why micron opening, mesh count and thread diameter should be considered together when selecting fine nylon mesh.
25 µm
JPP25-399- 157 mesh/cm
- 399 mesh/inch
- 43 µm thread diameter
- Exact target of this page
40 µm
JPP40-305- 120 mesh/cm
- 305 mesh/inch
- 43 µm thread diameter
- Larger clear opening than 25 µm
Selection principle: choose by required clear opening first, then verify thread diameter, mesh count, material compatibility and the mechanical requirements of the finished component. A coarser opening can often provide easier flow, but actual pressure drop depends on the full mesh geometry and operating conditions.
Supply & Fabrication
25 Micron Nylon Mesh from Roll Goods to Finished Parts
Once JPP25-399 is confirmed as the correct parent mesh, the final supply form can be defined by drawing, dimensions and assembly requirements.
Mesh RollsReference-width roll goods for conversion or in-house fabrication.
Cut PiecesSquare, rectangular or drawing-defined mesh pieces.
Mesh DiscsRound discs, rings and center-hole parts for compact assemblies.
Tubes & ScreensFabricated mesh forms where the selected construction is suitable.
OEM ComponentsDrawing-based filtration parts using a confirmed parent mesh.
Typical Uses
Where 25 Micron Nylon Filter Mesh May Be Considered
Application suitability depends on the process chemistry, temperature, cleaning method, required retention and the finished component design. The examples below are selection starting points, not universal approvals.
Fine screening of compatible coatings, inks and process liquids where a defined woven opening is desired.
Fine surface screening or equipment protection where nylon is chemically and thermally suitable.
Ingredient or process screening when the selected nylon grade and fabrication method are confirmed for the duty.
Fine particle screening in compatible chemical streams after reviewing concentration, temperature and cleaning chemistry.
Mesh inserts or screens used upstream of sensitive components where a 25 µm woven opening is appropriate.
Discs, screens and custom parts integrated into equipment using the confirmed JPP25-399 parent mesh.
Defined-opening mesh for compatible test rigs and pilot-scale screening assemblies.
Selected applications where the mesh can be cleaned without damaging the construction or changing process suitability.
Quotation Checklist
How to Specify 25 Micron Nylon Filter Mesh Correctly
Using the exact mesh reference removes ambiguity, but finished dimensions and operating conditions are still needed for a production quotation.
Reference JPP25-399 and confirm that 25 µm clear opening is the required woven construction.
Provide roll length, cut dimensions, disc OD/ID, tube dimensions or a drawing for the final component.
State the liquid, temperature, cleaning method, operating duty, quantity and any replacement sample or specification.
For critical service: do not select the mesh using “25 micron” alone. Confirm the exact construction, nylon grade, dimensional requirements and process compatibility before production.
Related Filter Mesh Pages
Continue from the 25 Micron Specification
Need a finished filter bag instead of raw mesh? See 25 Micron NMO Liquid Filter Bags. The filter-bag page covers a finished bag element for a housing, while this page covers the 25 µm nylon mesh media and fabricated mesh parts.
25 Micron Nylon Mesh FAQ
Frequently Asked Questions
Is 25 micron nylon filter mesh the same as 399 mesh?
For INCE filtration reference JPP25-399, yes: the construction is listed as 25 µm clear opening, 157 mesh/cm and 399 mesh/inch with a 43 µm monofilament thread. However, mesh count should never be treated as a universal micron conversion because thread diameter changes the clear opening.
Is 25 micron the same as 25 mesh?
No. Micron describes the clear opening size, while mesh count describes thread density. INCE filtration reference JPP25-399 has a 25 µm opening and is listed at 399 mesh/inch; a 25 mesh/inch screen would be a very different and much coarser construction.
Is 25 micron nylon mesh food grade?
Mesh size alone does not determine food-contact suitability. For food and beverage use, confirm the supplied nylon grade, applicable compliance documentation, process temperature, cleaning chemistry and the final fabricated component before ordering.
Does a 25 micron opening mean absolute 25 micron filtration?
No. The 25 µm figure is the clear woven aperture. Practical particle retention depends on particle shape and orientation, process loading, flow conditions and the design of the finished screen or filter component.
What is the INCE filtration product code for 25 micron nylon mesh?
The exact reference is JPP25-399. The listed construction is 25 µm opening, 157 mesh/cm, 399 mesh/inch, 43 µm thread diameter and 127 cm reference width.
What is the difference between 20, 25 and 40 micron nylon mesh?
The clear opening changes, and so do the mesh count and thread geometry. The listed nearby references are JPP20-457 for 20 µm, JPP25-399 for 25 µm and JPP40-305 for 40 µm. Choose by the required opening and operating conditions rather than by mesh count alone.
Can 25 micron nylon mesh be supplied as filter discs?
Yes, the confirmed parent mesh can be reviewed for round discs, rings and other cut forms. Provide the outside diameter, center-hole requirement, layer count, edge treatment and quantity.
Can I send an old mesh sample for replacement matching?
Yes. A physical sample, drawing or existing product code is useful because it allows the replacement to be matched by opening, thread diameter and overall construction rather than relying on a nominal micron description.
What information is needed for a quotation?
Send JPP25-399 or the required 25 µm opening, the finished dimensions or drawing, process liquid, operating temperature, cleaning method, quantity and any existing sample or replacement specification.
Need JPP25-399 or a Custom 25 Micron Mesh Part?
Send the required finished dimensions, process liquid, temperature, quantity and drawing or sample. INCE filtration can review the 25 µm parent mesh and the most suitable supply or fabrication route.
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