The Case IH 81674C1 is a genuine OEM lock ring designed for securing components within various Case IH agricultural and industrial machinery. This essential part ensures proper fitment and reliable operation, preventing loosening due to vibration and stress. It is a direct replacement for the superseded part number 1964236C1 and is commonly utilized in front axle assemblies and other critical applications across a wide range of Case IH tractor models, including the 766, 1066, 1466, 1566, 786, 886, 986, and numerous others.