Electrical & Enclosure Rubber Washers

Small, thin rubber washers for electrical and electronics work — panel and enclosure sealing, cable gland backing, standoff insulation, PCB mounting and junction box hardware. This collection concentrates on compact ODs from 5/16" to 1" in 1/16" and 3/32" thicknesses, sized for the small fasteners electrical work uses.

Rubber is naturally non-conductive, making these washers double as insulators and anti-vibration pads for sensitive equipment. Silicone is the electronics favorite for its temperature range and stability; Neoprene and EPDM seal outdoor enclosures. See the electrical and electronics guide, then locate exact dimensions with the Size Finder or the complete size chart.

FAQ

Are rubber washers electrically insulating?

Yes — all seven materials stocked here are non-conductive, isolating fasteners from panels and damping vibration on mounted electronics. Silicone offers the widest temperature range for hot-running equipment.