This is a sources sought notice for market research to identify companies capable of manufacturing or legitimately obtaining the NSN 1680-013902533, MAST, HEATER DRAIN, currently made by Electrofilm Manufacturing Company under part number 112190-5. The government is not soliciting offers, and no contract will result solely from responding. Interested parties must submit their response to the designated DLA contact to be considered. Companies wanting to become an approved source must submit a Source Approval Request (SAR) package demonstrating their product meets or exceeds the current item's quality. All responses and SAR submissions are directed to DLA Weapons Support in Richmond, VA.