TE Connectivity PIDG Heavy Duty Ring Tongue Crimp Terminals PIDG ring tongue wire crimp terminals consisting of a precision-formed metal wire barrel containing serrations which provide maximum contact and tensile strength after crimping. This barrel is enclosed in a copper sleeve and the whole is encased in a nylon colour coded insulation sleeve. These PIDG ring tongue wire crimp connectors have a heavy duty design for extra mechanical strength and are available with different barrel lengths and diameters to accept various wire sizes.