3M™ Nylon Insulated Closed End Connector, 722-N-A, 22-16 awg. 3M™ Scotchlok™ Large Gauge Compression Butt Connector ensures an ideal fit while offering reliable and safe performance. The connector has a non-insulated, seamless barrel and withstands a maximum temperature of 347 degrees F (175 degrees C). Electrolytic copper construction offers good conductivity and a tin-plated finish resists corrosion.