RM20M12K Circular Connector Contact, Machined, Trim Trio Series, Pin, Crimp. The RM20M12K is a solid machined contact for TRIM TRIO connectors, pin type, 0.32 to 0.52mm² wire. The contact is precision solid machined crimp snap-in pin for heavy -duty top performance requirements. Springs are made of spring-tempered, heat-treated, beryllium copper. The mating socket’s inner spring supplies high contact pressure to ensure low-resistance contact between pin and socket.