A threaded metal hose is a flexible connector designed with male (external) or female (internal) threaded ends, providing a compact and secure method for integration into piping systems. This design allows for direct screwing into corresponding threaded ports on equipment, valves, or pipes, eliminating the need for separate flanges or adapter fittings.

The primary advantage of threaded connections is their space-saving nature and mechanical robustness, making them ideal for applications with limited space or where a permanent, semi-permanent, but removable connection is required. The corrugated metal body, typically made of stainless steel, accommodates movement, vibration, and thermal expansion.

These hoses are commonly used in instrument lines, pressure gauges, sampling systems, and various industrial machinery. It is critical to ensure the thread standards (e.g., NPT, BSPT, BSPP) are correctly matched to the system to prevent leaks and ensure a safe connection.