The P4BU is a face seal #4 bulkhead union with a built-in nut, designed for secure connections in hydraulic and pneumatic systems. This fitting is constructed from high-quality materials, ensuring durability and resistance to wear. Its face seal design provides a leak-proof connection, essential for maintaining system integrity under pressure. The P4BU is compatible with various hoses and fittings, offering versatility in installation. Compliant with industry standards, this bulkhead union is a reliable choice for professionals seeking quality components.