Steel pipe nipple is a short piece of pipe usually with threads in both ends, for connecting of two other fittings.
The length of nipple generally is specified by the overall length with threads part. Also it may have a hexagonal section in the center for a wrench to grasp (we call hex nipple), or it may simply made from a piece of pipe ( we call it barrel nipple or pipe nipple).
Pipe Nipple used for low pressure liquid delivery, such as water, gas, and oil; it can also be used to make fence, greenhouse and other structures.
