The 4MJ-12MM Washer & O-Ring Fitting by Fittings Unlimited Inc is engineered for secure connections in fluid systems. This fitting includes a washer and O-ring, ensuring leak-proof performance. With a size of 4MJ-12MM, it is suitable for various applications, including hydraulic and pneumatic systems. The high-quality materials used in its construction provide excellent resistance to wear and corrosion, making it a reliable choice for demanding environments. This fitting meets industry standards, ensuring compatibility with a wide range of systems.