3M™ Scotchlok™ Non-Insulated Brazed Seam Butt Connector ensures an ideal fit while offering reliable and safe performance. The non-insulated, brazed-seam barrel with a beveled mouth that guides the wire into position 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.