319/419 .100' Concave Face Target Connectors Mill-Max 319/419 .100' Grid Concave Face Target Connectors for Spring-Loaded Assemblies feature a concave face providing greater surface area for mating with Mill-Max's standard .042' diameter plungers. Target connectors provide an excellent gold-plated conductive path back to the board-mounted spring pin connector. The connectors are available in through-hole or SMT mounting and single or double rows with high-temperature thermoplastic insulators.