This versatile rubber grommet is designed to insulate and seal around holes cut in solid panels. With an inner diameter of 5/16" and an outer diameter of 5/8", it fits securely into panel holes with a diameter of 1/2" and a panel thickness of 1/4". The overall thickness of 11/16" ensures robust and reliable application, providing excellent protection and durability. Constructed from flexible SBR rubber with a durometer hardness of 55A, this grommet offers the perfect balance of flexibility and toughness. It effectively dampens vibrations and minimizes abrasion, making it ideal for a wide range of applications. Suitable for both indoor and outdoor use, this black rubber grommet can withstand temperatures ranging from 0° to +180° F, ensuring reliable performance in various environments. Whether you need to insulate cables, seal openings, or protect components from vibration and abrasion, this rubber grommet provides a dependable and efficient solution. Its high-quality construction and versatile design make it an excellent choice for industrial, commercial, and DIY projects. Choose our rubber grommet for superior protection and durability in all your panel installations. RGR516122