Industrial 420915961 Piston Ring Bore Diameter 67.75mm

Industrial 420915961 Piston Ring is an aftermarket replacement component engineered for engines that use a 67.75 mm cylinder bore, providing the essential sealing surface between piston and cylinder wall. The designation 420915961 uniquely identifies this ring in industrial repair catalogs and supplier inventories, signaling a non-OEM option designed to meet the exact bore specification of 67.75 mm. As a piston ring, it plays a critical role in maintaining compression, repressing blow-by, and helping regulate oil migration within the piston cylinder assembly when installed in a matching bore. Because bore compatibility is essential for proper ring seating and performance, confirm that your engine's cylinder bore is 67.75 mm and that the replacement part aligns with your maintenance documentation before swapping rings. This description reflects the available details: industrial designation, part number 420915961, and bore diameter 67.75 mm, indicating its use as a precise aftermarket option for repairs requiring that exact size.