Fästdon

Fästdon is the Swedish term for fasteners, a family of devices used to join two or more objects. The category includes a wide range of mechanical fasteners such as screws, bolts, nuts, washers, rivets, pins, nails, and clamps. Fästdon are applied in many industries and in everyday repair work.

They are selected based on the type of load the connection must carry (tension, shear), whether the joint should be permanent or detachable, and the materials being joined. The choice depends on factors like environment, ease of assembly, and required strength.

Materials commonly used for fästdon include steel (carbon and alloy), stainless steel, brass, aluminum, and various plastics. Finishes such as zinc plating, galvanization, or nickel plating are often used to improve corrosion resistance and durability. The choice of material and finish affects compatibility with the joined parts and long-term performance.

Standards and specifications play a key role in fästdon. Dimensions and mechanical properties are governed by international and national standards (ISO, EN, ANSI/ASME, SAE). Fasteners are often described by size, thread type, drive/heads, and strength classes or grades, which help ensure interchangeability and reliability across products and countries.

Manufacturing and installation processes vary. Many fasteners are produced by cold forming, while rivets may be formed by extrusion. Creating threads can involve tapping or forming. Installation typically requires tools such as screwdrivers, wrenches, or rivet guns, and may include considerations for torque, lubrication, and surface preparation.

Applications span construction, automotive, machinery, electronics, and consumer products, where fästdon enable assembly, disassembly, and maintenance with varying requirements for strength, durability, and ease of use.