For window & insect screen mesh, Insect screen convention defines the specification designations and tolerances. The sections below describe the scope, the properties it leaves to companion standards, and the equivalent designations across standards bodies.
Insect screen convention — Scope
Insect screen convention specifies the designation system, dimensions and tolerances of window & insect screen mesh — mesh count or nominal opening, wire diameter and the permissible aperture deviations. Alloy chemistry, mechanical testing and delivery condition are governed by separate documents in the same standards family.
Tolerance Classes
Insect screen convention defines tolerance limits on the average aperture and on the maximum single aperture, tightening as the aperture gets finer. For test-sieve duty the tighter ISO 3310-1 tolerances apply instead of the general cloth tolerances — specify sieve grade explicitly if the mesh will be used for particle-size analysis.
Specifications Defined by Insect screen convention
| Mesh count | Wire diameter (mm) | Aperture (mm) | Micron rating (u00b5m) | Open area (%) | Weight SS (kg/mu00b2) | Reference standard |
|---|---|---|---|---|---|---|
| 14-Mesh | 0.28 | 1.53 | 1534 | 71.5 | u2014 | Insect screen convention |
| 16-Mesh | 0.26 | 1.33 | 1328 | 69.9 | u2014 | Insect screen convention |
| 18-Mesh | 0.23 | 1.18 | 1181 | 70.1 | u2014 | Insect screen convention |
| 20-Mesh | 0.23 | 1.04 | 1040 | 67.1 | u2014 | Insect screen convention |
Equivalent Standards
Where direct equivalents exist (ISO ↔ ASTM ↔ DIN), they are listed on the parent Window & Insect Screen Mesh page. Confirm against the specification table on this page — nominally equivalent documents can differ in tolerance limits.
Companion Standards
Insect screen convention controls the geometry of window & insect screen mesh. Companions frequently cited alongside it: ISO 565 / ASTM E11 (test-sieve aperture series), ISO 3310-1 (test sieves of metal wire cloth), ISO 4783 (selection of wire and aperture combinations), ISO 9044 (industrial woven wire cloth), and ISO 2941 (collapse/burst rating for finished filter elements).
