The NITTO KOHKI Series 350 CUPLA quick coupling socket is a high-performance solution designed for demanding hydraulic applications, offering a leak-free “flat-face” connection with internal BSP and BSPT threads. Manufactured in Japan from premium nickel-plated alloy steel, it ensures exceptional durability, resistance to vibrations, and reliable performance under pulsating pressure conditions. Thanks to its advanced design, the coupling minimizes air inclusion, enhancing system efficiency and protecting sensitive components. Equipped with a safety pin that prevents accidental disconnection, it guarantees secure operation even in environments with sudden pressure fluctuations, such as casting equipment. The ergonomic construction allows convenient one-hand operation, while the unique feature of consistent working pressure—independent of coupling size—provides maximum flexibility in system design. With a wide operating temperature range from -20°C to +180°C, Viton sealing for superior chemical resistance, and a working pressure capacity of up to 345 bar, this coupling delivers outstanding reliability. Engineered for a pressure drop of just 3 bar, it ensures optimal flow and efficiency, making it an ideal choice for industries requiring precision, safety, and long-lasting performance.