klinknagel

Klinknagel is a type of mechanical fastener, commonly referred to simply as a rivet in Dutch. It consists of a metal pin with a head on one end. The other end is deformed during installation to create a second head, forming a permanent joint that holds two or more parts together. The process typically requires a drilled hole through the parts to be joined.

There are different kinds of klinknagels. Solid rivets, or traditioneel klinknagels, are driven from one side and the tail is upset on the opposite side to form the second head. Blind rivets, known as blinde klinknagels or popnagels, are designed for access from only one side; they use a mandrel that is pulled through the rivet body to create the second head. The choice depends on access, strength requirements, and the materials involved. Materials for klinknagels include steel, aluminium, copper and bronze, each offering different strength and corrosion resistance.

Klinknagels have been used for centuries in shipbuilding, bridges, and metal structures, and were widely employed before the advent of welding. In aerospace and automotive industries they remain in use for specific joints, where a permanent, vibration-resistant connection is required or where welding is impractical. The installation quality depends on proper hole size, rivet material, and the deformation technique. While strong and durable, klinknagels require skilled workmanship and suitable tools; they can be more time-consuming to install compared with modern fasteners, depending on the application.