The MB Hex Socket O-Ring Boss Plug from Pressure Connections Corp. is a reliable steel fitting designed for hydraulic applications. Featuring a hex socket for easy installation, this plug ensures a secure fit with its O-ring boss design, preventing leaks under pressure. Made from durable steel, it is suitable for a variety of industrial and automotive applications. This plug meets industry standards, ensuring compatibility with a wide range of hydraulic systems, making it an essential component for maintaining system integrity.