The McCormick 1801864M1 is a genuine cylinder head gasket designed for use with Perkins A4.212, A4.236, A4.248, AD4.236, AT4.236, and T4.236 engines. This essential engine component ensures a tight seal between the cylinder head and engine block, preventing leaks and maintaining optimal engine compression. It is also compatible with various Massey Ferguson agricultural machinery models, including tractors, industrial equipment, and combine harvesters.