TE Connectivity Unsealed MCP 2.8mm Tab Housings Unsealed MCP 2.8mm tab housings made from PA 66 GF13. These MCP 2.8mm tab housings accept a wire size of 2.5 mm² FLR max and have various keying options (see table). For suitable mating MCP 2.8 receptacle housings see stock number 726-9045 typically and for secondary locking device see 726-9105 typically.