TE Connectivity PLASTI-GRIP Butt Splice Wire Crimp Terminals PLASTI-GRIP closed barrel butt splice wire crimp terminals made of high conductivity tin plated copper with an expanded high dielectric strength 94V-0 rated vinyl insulation sleeve. The inner barrel of these PLASTI-GRIP butt splice crimp connectors is serrated in order to provide maximum electrical contact and tensile strength after crimping. The funnelled entry on the wire barrel enables the stripped wire to be inserted more easily.