kuusiokärkiin

Kuusiokärkiin is a Finnish term that translates to "hexagonal tip" or "six-sided tip." It is most commonly used in the context of fasteners, specifically screws and bolts. A kuusiokärki refers to a drive type where the internal recess of the fastener is shaped like a hexagon. This allows for a hexagonal key, often called a hex key or Allen wrench, to be inserted and turned to tighten or loosen the fastener.

The hexagonal drive system offers several advantages. It provides a good grip on the tool, reducing the likelihood of cam-out, where the tool slips out of the recess. This is particularly useful for high-torque applications. The hexagonal recess can also be made with tighter tolerances, contributing to a more secure fit.

While often associated with Allen wrenches, the term kuusiokärki specifically describes the shape of the recess in the fastener head itself. The corresponding tool is then designed to match this hexagonal shape. This type of fastener is widely used in furniture assembly, bicycle maintenance, machinery, and many other applications due to its reliability and ease of use. The term is less common in general English conversation but is a standard descriptor in technical contexts, particularly within Finnish-speaking manufacturing and engineering circles.