The quick coupling plug with external NPT thread is a lightweight yet highly durable solution designed for demanding applications in water, chemical, and pneumatic systems. Unlike traditional heavy couplings with balls and securing sleeves, its innovative construction ensures minimal weight while maintaining exceptional strength and reliability. Equipped with a high-performance valve, it guarantees excellent flow capacity with minimal leakage, while the option without a shut-off valve provides additional flexibility depending on system requirements. The coupling allows slight hose rotation, effectively preventing twisting and accidental disconnection, which significantly improves safety and ease of use. Thanks to its outstanding chemical resistance and mechanical durability, it is perfectly suited for use in chemical photographic processes, battery and accumulator filling systems, sprayers, pneumatic installations, and with non-freezing liquids. Manufactured from UV-resistant polysulfone and sealed with an EPDM o-ring, it withstands working pressures up to 8.6 bar and operating temperatures ranging from -40°C to +138°C. Its compatibility with autoclaving further enhances its versatility, making it an ideal choice for industries that demand reliability, hygiene, and long-lasting performance.