TE Connectivity MATE-N-LOK Connectors provide a highly reliable and economical means of grouping multiple-lead connections in today's computer, computer/peripheral equipment, business machines, entertainment centers, appliances and other sophisticated commercial equipment. The MATE-N-LOK family of connectors offers the design and features to answer these modern industry requirements.The 770377-1 is a Keying Plug for use with universal MATE-N-LOK II plugs and caps. Applications Industrial