Jefferson Runner is a supplier of rubber grommets which may be typically used to protect wire, hose, pipe or other objects passing through a panel hole. Rubber grommets are also employed as vibration dampers, finishing components and spacers. Rubber grommets can easily slide into a pre-drilled panel hole.rubber grommet supplier Jefferson Rubber offers a variety of standard rubber grommets and military rubber grommets. We manufacture custom grommets and other rubber components to your spec.. Rubber grommets are manufactured in a variety of rubber compounds including, silicone, Buna-N, Viton® Neoprene and EPDM. Our military rubber grommets meet the requirements of MS-35489 military regulations and range in a variety of inner diameters, outer diameters, and groove widths. Rubber grommet applications include motors, tools, cars trucks, trailers, appliances, electronic equipment and many others. Grommets are used to protect against the sharp edges caused by drilled holes. If you application is for air lines, rope, cable, wiring or tubing, rubber grommets is your solution.