https://www.sameskydevices.com/product/thermal-management/heat-sinks/board-level-heat-sinks/extruded-heat-sinks/hse-b18635-035h
HSE-B18635-035H | Extruded Heat Sinks | Board Level Heat Sinks | Heat Sinks
Extruded Heat Sink, TO-218, 3.5 mm Vertical Solder Pin
extruded heat sinkshseboardlevel