Abstract: An improved blow mold alignment system for aligning blow mold halves relative to one another. The system includes the alignment pins having a cylindrical tip section and conical following section on one blow mold half. Sockets for the pins are provided in a cooperating blow mold half. Each socket has a corresponding configuration for snugly engaging a pin in one end thereof and has an opposite open end which aligns with a channel created in the blow mold half. The channel terminates in an outlet formed in a wall of the mold half at a position subjacent that of the socket.