The Donaldson P550396 is a genuine OEM spin-on lube oil filter designed for robust engine protection. Featuring a 93mm outer diameter and 175mm length, this full-flow filter utilizes a 1-16 UN thread size and a cellulose media for efficient filtration. It includes both an anti-drainback valve and a bypass valve set at 1.7 bar (25 psi), ensuring optimal oil flow and preventing dry starts. With a 25-micron efficiency rating, the P550396 effectively captures contaminants, extending engine life and maintaining performance. It is a direct equivalent to various OEM part numbers from brands like Caterpillar, John Deere, and Cummins.