Silicone Rubber BootBlack5/8" Round NutFor bat handle toggle switches, push button switches, and panel seal circuit breakers Provides a watertight seal between switch actuator, bushing, and panel face Mounting nuts are bonded to eliminate delamination Thermal characteristics insure reliable performance over a wide temperature range Inhibits the rotation of switches or circuit breakers subjected to low frequency vibration Resists discoloring and cracking