The McCormick 394199X1 Filler Plug is a genuine OEM replacement component, also cross-referenced as International Harvester 394199X1. This essential part is designed for a wide range of International Harvester and McCormick agricultural tractors. It ensures proper sealing of fill points, preventing leaks and contamination, and maintaining the integrity of your machinery's fluid systems. Compatible models include B250, B275, B414, 434, 444, 354, 374, 384, 454, 474, 475, 574, 674, 774, 884, 2400, 2500, 3434, 3500, 3600, 3616, 3800, 4000, 4500, 5000, 6000, 7000, and 8000 series.