Self-tapping stud

Joining materials of different structure — wood/metal, ceramic/concrete, wood/stone — requires special fasteners.

A self-tapping stud (other names: dowel screw, double-ended screw, sanitary bolt) is a rod with two types of thread at its ends: a wood screw thread and a metric thread. Between them is a hexagon section for a wrench.

Technical specifications

1. Sizes: length — from 40 to 300 mm, diameter — from 4 to 12 mm. Parameters are designated as M4×100, M6×80, etc.
2. Material: carbon or stainless steel.
3. Anti-corrosion coating: white zinc.

Installation rules

The main application of the self-tapping stud is mounting plumbing fixtures. It securely fastens sinks, toilets and bidets to wooden, concrete, brick and stone surfaces. Dowel screws are also used in furniture production and finishing work — for attaching heavy decor to walls made of hard materials.

Installation requires plastic wall plugs of the appropriate size. When screwed in, the screw end should protrude beyond the end of the wall plug by a distance equal to its own diameter.

Installation steps:

1. Drill a blind hole for the wall plug and clean it out.
2. Insert the wall plug.
3. Screw the stud into the wall plug.
4. Place the part to be attached onto the threaded tie section.
5. Fit a washer onto the protruding end of the stud, then tighten a nut to clamp the parts together.