The McCormick 3688928M1 piston is a genuine OEM component designed for various agricultural machinery, including McCormick, Massey Ferguson, and Landini tractors, as well as several Perkins engine models. This high-quality piston features a bore of 91.44 mm, an overall length of 95.00 mm, and is designed for a 34.92 mm diameter piston pin with a length of 76.2 mm. It incorporates a 3-ring configuration for optimal engine performance and sealing. Weighing 0.77 kg, this piston ensures reliable and durable operation in demanding agricultural applications.