Silicone Rubber BootBlack5/8"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 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 Resists discoloring and cracking Black. Used for bat handle toggle switches, push button switches and panel sealed circuit breakers. Provide a watertight seal between the switch actuator, bushing and panel surface. ... SKU: NVN-33904 MPN: 048-001 UPC: 602290101001