Molex Avikrimp Insulated Crimp Ring Terminals Avikrimp™ insulated crimp ring terminals with a seamless barrel and halogen free nylon insulation. These Avikrimp™ insulated crimp ring terminals are made from copper with tin plating and have a tin plated brass ferrule. The seamless barrel of these Avikrimp™ crimp ring terminals enables easier crimping by allowing the barrel to rotate in the crimping jaws and are also available in different wire and stud sizes.