The 399881R2 Valve Regulator Pin is a genuine International Harvester (IH) replacement component, crucial for the proper function of the hydraulic or transmission valve assembly in various IH tractor models. This precision-engineered pin ensures reliable regulation and operation within the system. It is compatible with numerous IH tractor series, including but not limited to the 240, 340, 404, 424, 444, 454, 464, 484, 495, 504, 574, 584, 585, 595, 606, 674, 684, 685, 695, 706, 784, 785, 795, 806, 884, 885, 895, 966, 986, 1066, 1086, 1206, 1256, 1456, 1466, 1468, 1486, 1566, 1568, 1586, 2400, 2400A, 2400B, 2404, 2424, 2444, 2500, 2500A, 2500B, 2504, 2544, 2606, 2656, 2706, 2756, 2806, 2826, 2856, 3088, 3288, 3388, 3488, 3588, 3688, 3788, 4100, 4156, 4166, 4186, 4300, 4366, 4386, 4568, 4586, 4786, 5088, 5288, 5488, 6388, 6588, 6788, 7288, 7488, 7588, 7788, 7888, 8888, Hydro 100, Hydro 186, Hydro 70, Hydro 84, Hydro 86, Hydro 966, and Hydro 986.