Which type of coupling is a non-threaded hose end that locks or twists together?

Storz coupling is designed as a non-threaded hose end that creates a secure connection by using a locking mechanism, which typically involves a twist or a lock feature. This type of coupling is particularly advantageous in firefighting scenarios, as it allows for rapid connections and disconnections, facilitating quick deployment of hoses in emergency situations. The smooth, flat surface of the Storz coupling helps in achieving a reliable seal without the need for threaded engagement, enhancing speed of use and operational efficiency.

In terms of application, Storz couplings are widely utilized in situations where firefighters need to connect or disconnect hoses under pressure, which could be cumbersome with threaded options. The design helps to minimize the risk of cross-threading, a common issue with threaded couplings, thereby ensuring a more reliable and robust connection.

The other types of couplings mentioned, while also used in various applications, do not share the specific locking mechanism and design features of a Storz coupling. For example, threaded couplings require a screw-type engagement that can be slower, while cam lock and quick connect couplings may not provide the same level of robustness or pressure resistance as Storz couplings commonly do in high-demand environments like firefighting.