Screws/Nuts/Bolts are used to attach pipes, fixtures, and other components to each other or to a surface. Screws are typically inserted into pre-drilled holes and secured with nuts on the opposite side, creating a strong and secure connection. Nuts can also be used to adjust the tension or tightness of a connection by tightening or loosening them with a wrench or pliers. PartsFe of... https://partsfe.com/plumbing-parts/screws-nuts-and-bolts