The John Deere AT472918 is a genuine OEM AdBlue/Diesel Exhaust Fluid (DEF) tank adapter, precisely engineered for a wide range of John Deere agricultural, construction, and forestry equipment. This critical component facilitates the correct connection and sealing within the DEF tank system, which is essential for maintaining emission compliance and optimal machine performance. Manufactured to John Deere's stringent quality standards, the AT472918 adapter ensures durability, reliability, and a perfect fit for seamless integration into your machinery's DEF system.