The 6409-02VBRN Hex Socket O-Ring Boss Plug is a premium steel fitting designed for sealing applications in hydraulic systems. Featuring a Viton O-ring, this plug ensures a leak-free connection, even under high-pressure conditions. Its durable steel construction provides resistance to wear and corrosion, making it ideal for demanding environments. The hex socket design allows for easy installation and removal, while the precise dimensions ensure a secure fit. Compliant with industry standards, this O-ring boss plug is a reliable choice for professionals in the field.