The selection of the basic material for spring contact probes, i.e. for barrel, plunger, spring and receptacle, is made according to various criteria. In addition to the technical suitability of the material, processing properties and economic aspects also play a role.
The surfaces of all individual parts of the spring contact probes are usually coated by galvanic processes. The base materials are thus protected against corrosion. In the assembled spring contact probe, the coating also ensures low friction and thus low wear as well as low contact resistances.