ADC, L.P. - ADC, L.P. is an experienced designer and supplier of custom aluminum and zinc die castings and sub-assemblies to original equipment manufacturers in the Automotive, Agriculture, Construction, Electronics and Appliance industries. The company operates facilities in Wheeling, IL and Elk Grove Village, IL. Its casting, machining and assembly expertise encompass a broad range of parts, from automotive powertrain and engine front covers, upper intake manifolds and accessory mounting brackets, to gas valve bodies and heat sinks for the Electronics industry.