Extremely durable, sealed threaded connectors, madeby Switchcraft in the USA. TS Series Dura-Twist® Connectors are made from nickel plated brass with a medical technology grade plastic insulator and gold plated contacts. They are sealed to IP68 and rated for at least 5,000 insertion/ withdrawal cycles. Althought they are less than 1/2" in diameter, they can be ordered with up to 9 contacts. (2 thru 5 #20 contacts or 6 thru 9 #26 contacts) Their unique contacts can be either soldered or crimped for maximum flexibility and easy installation. Factory overmolded cables are also available.