TE Connectivity MCP 2.8 Receptacle Housings with Secondary Locking. A range of unsealed MCP 2.8 receptacle housings with secondary locking mechanisms. These MCP 2.8 receptacle housings are made from PA 66 GF13 and accept a wire size range of 2.5mm ;sup>2 ;/sup> FLR max, except for 3 way versions that accept a wire size range of 4mm ;sup>2 ;/sup> FLR max. The various keying options for these MCP 2.8 automotive receptacle housings are shown in the table. For suitable MCP 2.8 tab housings please see stock number ; 726-9013 726-9013 typically. Secondary locks are also available, please see stock number ; 726-9108 726-9108 typically.