Insulated Metal-Clad Tip Jack Series Cinch Connectivity insulated metal clad Tip Jack Series test jacks have a nylon body and nickel-plated brass jacket, gold-plated turret terminal contact with wrap-around beryllium copper spring. The Tip Jack series comes with a nickel-plated washer and nut and mounts in panels up to 5.5 mm thick. Breakdown Voltage: 5700 VRMSCurrent: 10 AFormed contact with slotted terminal Nylon UL approved for self-extinguishing