Connecting Rod (colloquially, con-rod)
Rigid H-section forging or casting, usually made from alloy steel, which connects the piston and crankshaft. The cranks aft end terminates in a large split bearing (the big-end bearing) which fits closely round the crankpin, while the upper end includes a much smaller bearing (the little-end, or small-end, bearing) fitting round the gudgeon pin secured to the piston.