Connecting wires is faster and easier than ever with the professional performance features of Easy-Twist wire connectors from NSI. These closed-end connectors feature a corrosion and chemical resistant nylon cover over a metal crimp cap wire terminal. These connectors are easy to install; simply twist your wires together to form a connection, then slide the closed end butt connector over the pigtail and crunch it tight with adjustable pliers or a specialized crimping tool. We designed these closed-end connectors to fit wires in the 12-10 AWG size range with a maximum voltage of 300V. They are UL 94V-2 certified as self-extinguishing and they’re temperature rated to 105˚C (221˚F). Experience the advantage for yourself to see how easy connecting wires can be.