| Openings | Tolerance | ||
| inch | mm | inch | mm |
| 1⁄16 to 1⁄8 , incl | 1.6 to 3.2, incl | ±0.007 | ±0.18 |
| Over 1⁄8 to 3⁄16 , incl | Over 3.2 to 4.8, inc | ±0.010 | ±0.25 |
| Over 3⁄16 to 1⁄4 , incl | Over 4.8 to 6.4, inc | ±0.012 | ±0.30 |
| Over 1⁄4 to 3⁄8 , incl | Over 6.4 to 9.5, incl | ±0.015 | ±0.38 |
| Over 3⁄8 to 1⁄2 , incl | Over 9.5 to 12.7, incl | ±0.017 | ±0.43 |
| Over 1⁄2 to 3⁄4 , incl | Over 12.7 to 19.1, incl | ±0.020 | ±0.51 |
| Over 3⁄4 to 1,incl | Over 19.1 to 25.4, incl | ±0.030 | ±0.76 |
| Over 1 to 1-1⁄2 ,incl | Over 25.4 to 38.1,incl | ±0.045 | ±1.14 |
| Over 1-1⁄2 to 3 ,incl | Over 38.1 to 76.2,incl | ±0.075 | ±1.90 |
| Over 3 to 5 ,incl | Over 76.2 to 127.0,incl | ±0.100 | ±2.54 |
| Over 5 to 7,incl | Over 127.0 to 177.8,incl | ±0.125 | ±3.18 |
| Over 7 | Over 177.8 | ±0.188 | ±4.78 |
filtercc
wire screen （wire mesh ,wire cloth ）the biggest of world manufacture,application for shielding, water, filter and coal industry