Genuine Cummins 4995185 D-Ring Seal | ISF 2.8L ISF 3.8L Drain Plug

The Genuine Cummins 4995185 D-Ring Seal is a specialized OEM elastomer seal engineered to establish an unyielding, leak-free boundary in critical fluid management systems. Characterized by its distinct D-shaped cross-section, this hardware utilizes a flat profile base that resists twisting or rolling within its seating groove during installation, paired with a flexible lip to ensure tight mechanical compliance. Serving primarily as a heavy-duty oil pan drain plug seal, it stops unmanaged oil weeping and guards system pressures. Choosing a factory-certified Cummins replacement guarantees superior structural retention capable of enduring intense oil temperatures and harsh engine detergents without flattening, splitting, or fracturing. Anti-Roll Sealing Geometry: The specialized D-ring profile provides a stable mechanical foundation that prevents the seal from twisting, pinching, or displacing under high torque loads. Targeted Engine Fitment: Precision-engineered for an exact factory fit on light commercial and industrial Cummins ISF 2.8 (Euro 5), QSF 2.8, and ISF 3.8 diesel engines. High-Resilience Elastomer: Molded from premium, chemical-resistant rubber compounds designed to combat deterioration from extended exposure to hot engine oil and fuel chemistry. Drain Plug Protection: Restores original manufacturing tolerances to the engine oil pan drain assembly, neutralizing high-frequency chassis vibrations that cause standard rings to back out or leak.