BSP and NPT internal threaded 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 precisely engineered elements: a spherical GB end with a ribbed hose tail, a robust wing nut B with a dedicated NPS internal thread, and a GFB adapter featuring an external NPS thread and a matching internal thread. The adapter is equipped with a conical polymer or copper insert that perfectly aligns with the spherical end, guaranteeing a secure, steam-tight seal resistant to high pressure and extreme temperatures. Thanks to the ergonomic wing nut, the connection can be quickly tightened or released without the need for specialized tools, making maintenance and hose replacement fast and efficient. Manufactured from galvanized steel or cast iron, these fittings withstand working pressures up to 18 bar with saturated steam at +210°C and operating temperatures reaching +230°C, ensuring long-lasting reliability. Ideal for industries where safety, efficiency, and resistance to harsh conditions are essential, they provide a professional solution for steam hose installations with BOSS SBC type clamps.