The precision sheet metal industry produces products that are typically used in electronics, vending systems, medical equipment, and test equipment.
In general, the materials used range in thickness from .020" (0.5mm) up to .250" (6.5mm). Thinner sheets are often called "shims" or "foils". Thicker material is referred to as "plate" or "ingot".
The precision aspect has to do with the dimensional accuracy of the parts. The thickness of the raw material is generally within 5% of nominal. The equipment used to fabricate the parts will typically hold within .005" (0.12mm). The significant variables in accuracy are typically the condition of the machinery and tooling, the size of the parts, the skill of the craftsmen, and the type of finish applied to the parts.
The materials and processes are versatile. A great diversity of product applications may be satisfied by proper design and engineering.