The MB Hex Socket O-Ring Boss Plug by Pressure Connections Corp. is a high-quality steel fitting designed for secure sealing in hydraulic systems. This plug features a hex socket design for easy installation and removal, making it user-friendly. The O-ring boss design ensures a tight seal, preventing leaks under pressure. Constructed from durable steel, it is suitable for various applications, including automotive and industrial settings. This plug meets industry standards, ensuring compatibility with a wide range of hydraulic systems.