This high-quality tube nut fit is designed for use with Cummins engines K19, K38, K50, QSK NT855, N14, and K60. It is made in China and is a reliable replacement part for your heavy equipment. The nut fit is compatible with a variety of heavy equipment parts and accessories, making it a versatile addition to your inventory. It is perfect for use in business and industrial settings where it is necessary to replace worn or damaged parts.