This high-quality filler cap is designed to fit perfectly with Cummins engines K19, K38, K50, QSK, NT14, and NT855. It is an essential component for ensuring the proper functioning of your engine, preventing oil spills, and maintaining the integrity of your engine's filler system. Crafted with precision and attention to detail, this filler cap is made to last, ensuring that your engine receives the best possible protection. It is an OE/OEM part number and manufacturer part number 3088296, making it a reliable and genuine product. Ideal for use in oil drain plugs, filler caps, and dipsticks, this item is a must-have for any engine enthusiast or professional mechanic.