Internal thread BSP and NPT fittings for rubber steam hoses are designed to ensure maximum safety, durability, and convenience in demanding industrial environments. Each complete fitting is composed of three precision-engineered elements: a spherical end GB with a ribbed spigot for secure hose attachment, a robust wing nut B with a dedicated NPS internal thread, and a specialized GFB adapter featuring an external NPS thread and a matching internal thread. The adapter is equipped with a conical polymer or copper insert that works seamlessly with the spherical end, creating a perfectly sealed, steam-resistant, and high-temperature connection. Thanks to the ergonomic wing nut, assembly and disassembly are quick and tool-free, making maintenance efficient and cost-effective. Manufactured from premium stainless steel AISI 316, the fittings guarantee exceptional resistance to corrosion and extreme conditions. With a working pressure of 18 bar at +210°C saturated steam and an operating temperature up to +230°C, they deliver reliable performance even in the most challenging applications. For 2” fittings, it is important to note that BOSS SBC steam clamps with 4 claws should not be used due to the reduced lock design, ensuring optimal safety and compatibility. These fittings represent a professional solution for industries where reliability, efficiency, and safety are paramount.