TE Connectivity M Series Standard Housings for Pins and Sockets M Series standard plug and receptacle housings made from phenolic glass fibre with cavities for Multimate Type II and Type III+ and COAXICON plug or receptacle contacts (apart from stock number 745-5549 which only accepts pin contacts). Type III+ solder type contacts are also accepted. Stock number 719-9706 has a "T" handle centre fastener. These M Series free hanging, panel mount standard housings mate with each other as well as with posted connectors of the same size.