1" Groove Rubber Grommets – Strong Sealing for 1" Panel Holes

Shop 1 inch rubber grommets — every grommet on this page has a 1" groove diameter, meaning it snaps into a 1" hole drilled or punched in your panel. Within this size we stock multiple inside diameters (the wire opening) and groove widths (the panel thickness the groove grips), so match all three dimensions for a snug fit. A 1 inch grommet is one of the most common sizes for passing wiring harnesses, hose, and cable bundles through equipment panels, electrical enclosures, automotive firewalls, and furniture.

Not sure this is your size? Measure the panel hole, not the grommet's outer flange — the hole diameter equals the groove diameter you need. Use the Rubber Grommet Size Chart & Finder to jump to any groove size from 1/4" to 4-3/16", or read how to measure a rubber grommet. Sealing a 1" hole with nothing passing through? Use a closed/blank grommet or rubber hole plug instead.