Enhance your Kubota tractor's functionality with the genuine Straight Grease Fitting, specifically designed for model number 75599-81521. This fitting features a 1/4"-28 long thread, ensuring a secure and precise fit for your maintenance needs. Manufactured in the United States, it is a reliable replacement or upgrade part that meets the original equipment manufacturer's specifications. The unit comes with a 90-day manufacturer warranty, providing you with peace of mind in its performance and durability. With the part number 75599-81521, this grease fitting is a non-performance part that is not vintage and is sold as a single unit, ready to be installed with ease. Keep your Kubota tractor running smoothly with this essential component.