Final answer:
Understanding the terminology associated with threaded connections is essential for proper assembly and functionality. In this context, the flattened angle is appropriately termed a chamfer.
Step-by-step explanation:
A flattened angle at the end of the threads on the male and female couplings is called the chamfer. The chamfer is a beveled or angled edge that facilitates the easier engagement of threads during the connection of male and female couplings. It serves to guide the threads into alignment, preventing cross-threading and promoting a smooth and secure connection.
Options:
Taper: While taper may be associated with some threaded connections, it generally refers to a gradual reduction in diameter or thickness.
Flare: Flare typically refers to a widening or spreading, not a feature at the end of threads.
Bevel: Bevel is similar to a chamfer but is more commonly associated with a broader, non-threaded edge.
Understanding the terminology associated with threaded connections is essential for proper assembly and functionality. In this context, the flattened angle is appropriately termed a chamfer.