The McCormick 148942C2 is a genuine OEM piston ring designed for International Harvester agricultural and industrial machinery. This essential engine component ensures proper compression and oil control, critical for engine performance and longevity. It features a bore of 98.42 mm and a thickness of 3.175 mm, making it suitable for a wide range of IH D-series engines including D179, D206, D239, D246, D268, D310, D358, DT358, D401, DT401, D436, DT436, D466, DT466, D466B, DT466B, D466C, DT466C. It also fits numerous IH tractor models such as 354, 364, 384, 444, 454, 464, 484, 485, 495, 574, 584, 585, 595, 674, 684, 685, 695, 784, 785, 795, 884, 885, 895, 995, 2400A, 2400B, 2500A, 2500B, 3434, 3444, 3500A, 3500B, 3600A.