Series 854 & 855 .050' Pitch Connectors Mill-Max Series 854 and Series 855 .050' Pitch Connectors are available as spring-loaded and mating-target, in single row and double row, and SMT and through-hole. The Mill-Max spring-loaded connectors accommodate uneven, non-parallel conditions and are used in portable instruments such as an internal battery connection or as an external connection for charging, as well as for blind mate assemblies such as stacking printed circuit boards. The Mill-Max mating-target connectors are RoHS compliant and suitable for reflow soldering.