The Case IH 3121253R1 nut is a genuine OEM replacement part designed for various McCormick and Landini agricultural tractors and machinery. This high-quality nut features an M18x1.5 thread and requires a 27mm wrench for installation. It ensures secure fastening in critical applications across models such as McCormick CX, C, F, T, V series and Landini 500, 600, 700, Blizzard, Ghibli, Legend, Mistral, Powerfarm, Rex, Trekker, and Vision series. Essential for maintaining the integrity and performance of your equipment.