møtrik

A møtrik is a threaded fastener designed to be paired with a bolt or threaded screw to secure two or more parts together. It is typically a hollow cylindrical body with an internal helical thread that matches the external thread of the mating bolt. When tightened, the nut clamps the parts against the bolt head or a washer, creating a secure connection and preventing loosening through vibration.

In Danish, møtrik is the standard term for a nut.

Materials and finishes: Nuts are manufactured in steel, stainless steel, brass, aluminum, and other alloys; they may be plated or coated (zinc, zinc-aluminium, or black oxide) for corrosion resistance. Some are made from plastic or nylon for electrical insulation or lightweight applications.

Common types include: hexagonal nut (the most widely used), flange nut (with a built-in washer-like flange), locknut (prevailing-torque or jam types), cap nut (domed top), and jam nut (thin). There are also longer coupling nuts and specialty shapes for sheet metal, flanges, or access.

Sizes and standards: Metric nuts follow ISO thread standards (designations such as M3, M6, M8) and are designed to mate with corresponding metric bolts. In other regions, nuts may use Unified thread standards (UNC/UNF). Manufacturing processes include forging, casting, or forming, and threads are produced by tapping or forming.

Applications: Nuts are used in countless mechanical assemblies to fasten parts securely. They are paired with bolts, screws, or studs, and are common in automotive, construction, machinery, and consumer products.