3M™ Ultra Hard Metric (UHM) Press-Fit Socket is a 2mm Ultra Hard Metric, B-type connector. It is end-to-end stackable with 5 row 3M(TM) CP2, HM, UHM and HSHM Sockets. It can run up to 7+ Gbps data rates when mated to standard IEC 61076-4-101 headers offering low crosstalk at high frequencies.