The MB Hex Head O-Ring Boss Plug is a durable steel fitting designed for sealing ports in hydraulic systems. With a size of 12, this plug features a hex head for easy installation and removal. Constructed from high-quality steel, it offers excellent resistance to wear and pressure, ensuring a long service life. This fitting is ideal for applications requiring a secure seal, preventing leaks and maintaining system integrity. Compliant with industry standards, it is a reliable choice for professionals seeking effective pressure connections.