01 — StandardWhat is 600 mesh in microns?
600 mesh is not a standard test sieve number, so there is no official opening. With an assumed 21.1 µm wire (interpolated between ASTM E11 sieves), the opening is about 21.2 µm. Real wire cloth varies, so check the supplier's spec.
02 — Specifications600 mesh specifications
| Opening (microns) | ≈ 21.2 µm |
| Opening (millimeters) | 0.021 mm |
| Opening (inches) | 0.0008 in |
| US standard sieve | Not a standard size |
| Tyler equivalent | — |
| Pitch (wire center to center) | 42.3 µm |
| Assumed wire diameter | 0.021 mm |
| Approx. open area | 25% |
03 — ApplicationsWhat is 600 mesh used for?
A 21.2 µm opening falls within the silt (3.9 µm–62.5 µm) class of the Wentworth grain-size scale. Comparing grain size with the nominal opening only: very fine sand and coarser would be retained; silt is split at about 21.2 µm. Real sieving also depends on particle shape, sieving time and the opening tolerance of the cloth.
We have no sourced application data for openings this size yet.
Ranges show common practice with sources on the mesh size by application page — always check your equipment maker's recommendation.
04 — CalculationHow the 600 mesh value is calculated
600 openings per inch gives a pitch of 25,400 ÷ 600 = 42.3 µm. Subtracting an assumed21.1 µm wire (interpolated between ASTM E11 sieves) leaves an opening of about 21.2 µm. Change the wire diameter in the calculator above to match your screen.
05 — CompareNearby mesh sizes
| Mesh | Microns (µm) | Millimeters | Inches |
|---|---|---|---|
| 400 mesh | 38 | 0.038 | 0.0015 |
| 450 mesh | 32 | 0.032 | 0.0013 |
| 500 mesh | 25 | 0.025 | 0.001 |
| 600 mesh | ≈ 21.2 | 0.021 | 0.0008 |
| 635 mesh | 20 | 0.02 | 0.0008 |
| 800 mesh | ≈ 15.9 | 0.016 | 0.0006 |
| 1000 mesh | ≈ 12.7 | 0.013 | 0.0005 |
Values are ASTM E11 nominal openings (Tyler equivalents for 150 and 250 mesh). Italic ≈ values are estimates for non-standard mesh counts, calculated from the mesh count and an assumed wire diameter (interpolated between ASTM E11 sieves, or extrapolated beyond No. 635). Wire values are ASTM E11 typical wire for standard sizes.
06 — FAQFrequently asked questions
How many microns is 600 mesh?
600 mesh is ≈ 21.2 µm, which is 0.021 mm or 0.0008 inches.
What size particles pass through a 600 mesh screen?
In a simplified comparison with the nominal opening, particles smaller than about 21.2 µm can pass a 600 mesh screen. A 21.2 µm opening falls within the silt (3.9 µm–62.5 µm) class of the Wentworth grain-size scale. Comparing grain size with the nominal opening only: very fine sand and coarser would be retained; silt is split at about 21.2 µm. Real sieving also depends on particle shape, sieving time and the opening tolerance of the cloth.
What is the open area of 600 mesh?
With a assumed 0.021 mm wire, 600 mesh has roughly 25% open area. Thicker wire lowers the open area and the opening size.