Gudgeon

A gudgeon is a socket-like, cylindrical (i.e., female) fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, enabling an interpivoting connection that can be easily separated. Designs that may use gudgeon and pintle connections include hinges, shutters and boat rudders.

The word gudgeon derives from the Middle English gojoun, from the Middle French goujon, which had the opposite meaning of a dowel or pin. Its first known use was in the 15th century.