M88-6005
Def Fill Neck Insert
Kenworth®

The Def Fill Neck Insert is an OEM component designed for Kenworth trucks to ensure a secure and sealed connection during DEF (Diesel Exhaust Fluid) filling. Made from durable, chemical-resistant materials, this insert prevents leaks and contamination, maintaining the integrity of the DEF system. Its precise fit simplifies the filling process and helps avoid spills, ensuring safety and cleanliness. Proper installation of this insert is crucial for maintaining system performance and compliance with emissions standards. Whether replacing a worn or damaged part or upgrading your DEF fill assembly, this genuine OEM insert guarantees compatibility and long-lasting service. Source One Parts Center offers the best selection of authentic Kenworth parts, providing quality assurance and expert support to keep your truck operating efficiently.