Kiinnitin

Kiinnitin is a Finnish term for a fastener, a hardware device designed to join two or more objects or hold them in place. Fasteners are used across industries to create detachable or permanent connections, enabling assembly, maintenance, and repair in areas such as construction, manufacturing, textiles, and electronics. The word kiinnitin is derived from kiinnittää, meaning to fasten or attach.

Common types include screws, bolts, nuts, rivets, nails, and pins, which form threaded, friction, or press-fit connections. Clamps, brackets, and cable ties are used to hold parts together without forming a permanent joint. Anchors and wall plugs provide a secure fixed point in masonry or concrete. The category also covers specialized fasteners such as threaded inserts, hanger bolts, and quick-release mechanisms.

Materials and finishes: Fasteners are made from steel (carbon or alloy), stainless steel, aluminum, brass, and various plastics. Finishes such as galvanization, zinc plating, black oxide, or anodizing improve corrosion resistance and appearance.

Standardization and specification: Sizes are usually described by diameter, length, and thread (for threaded fasteners). Metric sizes (M) and inch sizes are used, with various thread classes and compatibility standards set by ISO, DIN, ANSI, or JIS. Selection depends on load, environment, and whether the connection is temporary or permanent.