Mahle Spin-on Oil Filter OC21. Mahle has long been manufacturing high-quality oil filters for many large automobile and engine manufacturers. This high level of quality ensures reliable function, good engine protection, and satisfied customers. The diversity of types is constantly increasing. Areas of application range from petrol and diesel engines for passenger cars and commercial vehicles to motorcycles and small engines. Optimal lubrication of the bearings is extremely critical in all of these engines. Specifications: Filter Type: Spin-on Filter, Seal Diameter [mm]: 62.5, Height [mm]: 77.5, Housing Diameter [mm]: 71.5, Thread Size: 3/4"-16UNF-2B, Tightening Torque: 20 Nm. Replaces: OC21OF.