D-Rings are used in dynamic applications. These seals feature either a curved inside or a curved outside profile to optimize performance and sealing capacity.

Cat® D-Rings are made from materials that are matched to the fluids, temperatures and pressures found in Cat engines and machines. The materials resist wear and extrusion, and provide superior resistance to seal compression set. In addition, certain Cat D-Rings are coated with PTFE to minimize seal twisting and cutting during seal installation.
Dimensions of our D-Rings are consistently held to tight tolerances to ensure they fit properly into seal grooves with the necessary seal compression.
Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.