sänkskruv

A sänkskruv, or countersunk screw in English, is a type of screw designed to sit flush with the surface of the material it is fastening. This is achieved by the screw head having a conical or tapered underside that fits into a countersunk hole drilled into the material. When the screw is fully tightened, the top of the screw head is level with the surrounding surface, creating a smooth finish.

The primary advantage of using sänkskruv is aesthetic. It eliminates protruding screw heads, which can be unsightly, snag on objects, or pose a safety hazard. This makes them particularly useful in furniture making, cabinetry, and decorative applications where a clean and polished appearance is desired. In addition to aesthetics, a flush screw head can also offer some functional benefits, such as preventing dust and debris from accumulating around the screw.

Sänkskruv are available in various materials, including steel, stainless steel, brass, and even plastic, to suit different environmental conditions and strength requirements. They also come with different drive types, such as Phillips, slotted, Torx, or Pozidriv, to accommodate various tools and applications. The choice of sänkskruv depends on factors like the material being joined, the load it will bear, and the desired finish. Proper installation involves drilling a pilot hole and then a countersink hole of the appropriate size for the screw head to ensure it sits correctly.