A Hex.Nipple is a type of pipe fitting used to connect two threaded pipes or fittings together. It is named after its shape, which features a hexagonal (six-sided) section in the middle and threaded ends on either side. 

The Hex.Nipple is commonly used in plumbing, industrial, and hydraulic applications. It is particularly useful when there is a need for a short length of pipe to connect two threaded components or when space is limited. 

Hex.Nipples are available in a variety of materials, including stainless steel, brass, and carbon steel, to suit different operating conditions and compatibility requirements. They also come in different sizes and thread types, such as NPT (National Pipe Thread) or BSP (British Standard Pipe), to fit various piping systems.

One of the key advantages of a Hex.Nipple is its versatility and ease of installation. The hexagonal section in the middle allows for easy tightening or loosening with the help of a wrench, providing a secure and leak-free connection. The threaded ends enable quick and simple assembly or disassembly of pipe systems.

In summary, Hex.Nipples are reliable and convenient fittings for connecting threaded pipes or fittings. Their hexagonal shape provides a grip for easy installation and removal, while their threaded ends allow for straightforward connections. Whether it's for residential plumbing or industrial applications, Hex.Nipples offer a practical solution for joining pipes in a variety of settings.