The Internal Hexagonal Head Plug is designed with a hexagonal socket on the inside of the Plug, which allows for fixing and removal using a hex key or socket wrench. The Hexagonal shape also provides a secure grip for tightening the plug into place. Attributes:• Create a tight seal that prevents oil from leaking out of the Oil Pan• withstand the high temperatures and pressures associated with engine operation Applications:The Internal Hexagonal Head Plug is used to provide a reliable seal and is used in different parts like Cylinder Block, Engine Oil Pump, and Front Housing.