Summit Metal Products Summit Metal Products Corporation, previously known as Achar Manufacturing Corporation, has been serving the window and door industry for over 50 years... York, where sales have increased 1000%. Summit's primary product line is metal-stamped parts for windows, screens and doors, producing approximately 62 million parts per year of 200... a majority of the leading window manufacturers in the country. Summit continues to produce new parts, with in-house die-making facilities, and custom-order parts to meet...