Hasco Components International Corporation was established in 1976. They are the exclusive agent for OKI Electric Co. Ltd for reed switches and reed relays in North America. Along with being the OKI agent for reed products, Hasco manufactures a wide variety of general purpose electromechanical relays. Haso relays range from one pole to four poles. 

The current ratings on their relays can range from as low as milliamps, or up to 30 amps. Hasco stocks up to 400,000 relays and up to 4 million reeds.