Silicone Rubber Boot, Black, 5/8"Hex Nut. For 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 and highly flexible, tear resistant, silicone rubber construction enables an un-obstructed visual indication of switch actuator position. Thermal characteristics insure reliable performance over a wide temperature range. Inhibits the rotation of switches or circuit breakers subjected to low frequency vibration, and resists discoloring and cracking.