Which of the following is a type of threaded fastener specifically known for its male threads?

The type of threaded fastener that is specifically known for its male threads is the stud. A stud typically features external threads on both ends, allowing it to be inserted into a pre-drilled hole, with a nut securing it on either end. This design is particularly useful in applications where a fixed grip is required, as it can provide a strong and stable connection.

In contrast, a nut is a fastener with internal threads designed to fit onto male-threaded components. A washer functions as a shim or load disperser but does not possess threads of its own, as it is a flat piece used to provide a larger bearing surface. A jam nut, although having male threads, is primarily a thin version of a regular nut used to lock another nut in place, rather than being an independent fastener with threads readily available for securing applications. Thus, the stud stands out specifically for its male threads in the context provided.