The hexagonal plug with external thread is designed for reliable and secure closure of threaded couplings, available in NPT, BSP, BSPT, UNF, and UN standards, making it a versatile solution for a wide range of industrial applications. Manufactured from high-grade AISI 316 stainless steel, it ensures excellent resistance to corrosion, aggressive chemicals, and extreme operating conditions, meeting the demanding requirements of the chemical, petrochemical, pharmaceutical, energy, nuclear, and process engineering sectors. Versions with UNF and UN threads are additionally equipped with a durable FKM 90 O-ring seal, providing enhanced tightness and long-lasting performance even under high pressure and temperature fluctuations. Thanks to its robust construction and precision engineering, the plug guarantees operational safety, minimizes downtime, and supports efficient maintenance, making it an ideal choice for companies seeking reliable components that combine durability, functionality, and compliance with international standards.