3M™ Scotchlok™ S-11-A (Boxed) Nylon-Insulated Butted Seam Standard Closed-End Connector, 22 - 16 AWG, 100 pe carton, 500/Case. 3M™ Scotchlok™ Color-Coded Closed-End Connector is an electrical crimp sleeve connector with a copper insert that allows for fast splicing of copper conductors. The vinyl-insulated connector is 600V-rated for building wire and 1000V-rated for signs, fixtures or luminaires. It withstands temperatures of -40 to 221 degrees F (-40 to 105 degrees C).