A threading machine equipped with NPT dies is designed to cut which type of threads?

A threading machine equipped with NPT dies is specifically designed to cut National Pipe Threads. These threads are used primarily for piping systems to ensure a tight and secure fit, particularly in applications involving the conveyance of fluids and gases. NPT, or National Pipe Thread, is a standardized thread type that provides a reliable seal when mated, which is essential for maintaining pressure and preventing leaks in piping systems.

The design of NPT threads includes a tapered profile, which helps achieve a tight seal as the threads are tightened. This taper allows for a gradual increase in contact area between the male and female threads, enhancing the sealing capability. Threading machines with NPT dies are crucial in the plumbing and piping industry, as they ensure that pipes and fittings can be connected securely and effectively.

The other options, such as machine bolt threads, new pipe threads, and non-plumbed threads, do not refer to the specific taper and sealing mechanism associated with NPT threads. Instead, they represent different standards or types of threads that are used in various applications but do not align with the purpose of NPT dies. Thus, the correct answer reflects the specific threading standard that enhances fitting integrity in plumbing and piping applications.