A hexagon pipe nipple is a type of fitting used in plumbing and piping systems. It’s essentially a short piece of pipe with male threads on both ends, and the middle section is typically hexagonally shaped to allow for easy tightening with a wrench.

These fittings are commonly used to connect two female threaded pipes or fittings together. The hexagonal shape makes it easier to grip and tighten with a wrench, providing a secure connection that can withstand pressure and prevent leaks in the system. They come in various sizes and materials to suit different plumbing and piping applications.