Thisexpansion plug with manufacturer part number 3629168 is designed to fit Cummins engines KTA19, KTA38, KTA50, and NT855. These plugs are crucial components in the engine's cooling system and ensure proper functioning of the engine. Made in China, this unit type product is perfect for those looking to replace worn-out or damaged expansion plugs in their commercial truck engines. Take advantage of this great deal and keep your engine running smoothly with this high-quality expansion plug.