Dowel Screw

A dowel screw (plumbing stud) is a rod with a coarse single-start thread cut on one end and a standard metric thread on the other.

It is installed into wood, as well as into hard substrates using a wall plug. After installation, a section of the rod with metric thread remains exposed — plumbing fixtures or other structures are secured to it with a nut. In some cases it is used together with a plumbing clamp.

Drilling a hole is required before installation. The hole diameter must match the diameter of the screw rod or the wall plug specifications. This type of connection ensures reliable fastening and resistance to pull-out and shear loads.