The hydraulic screw quick coupling with shut-off valve, available as a socket or plug, is designed for maximum reliability and efficiency in demanding hydraulic systems. Equipped with internal BSP and UNF threads, it features an additional O-ring on the socket body that effectively prevents accidental loosening under pulsating pressure or vibration, ensuring uninterrupted performance even in harsh working conditions. The coupling allows connection under pressure up to 50 bar and fully complies with ISO 14541, guaranteeing compatibility with standardized solutions from other manufacturers. Manufactured from durable galvanized steel and sealed with high-quality NBR, it offers excellent resistance to wear, corrosion, and temperature fluctuations ranging from -25°C to +100°C. With a working pressure capacity of up to 450 bar, depending on size, and a safety factor of 4:1, this quick coupling provides both strength and security in hydraulic power applications. Optimized flow characteristics ensure minimal pressure loss, with a pressure drop of only 3 bar, making it an ideal choice for professionals seeking dependable, high-performance connections in hydraulic oil systems.