Fasteners are mechanical parts that are used to connect and secure two or more components. They usually have threaded or otherwise shaped surfaces that can be rotated or otherwise inserted into the connecting parts to hold them together.
Fasteners are used in a wide variety of applications in almost every industrial field. For example, bolts and nuts are among the most common fasteners, and by working together they can join two or more parts together. Studs are also a common fastener that is often used to connect parts that have holes in them.
Fasteners can also be categorized based on their shape, material and purpose. For example, bolts and nuts are among the most common fasteners, and they are typically used to connect structural, mechanical equipment and engineering components. Screws are also a common type of fastener that usually have a head and are used to connect parts with holes.
In addition, there are some special fasteners such as lock nuts, self-tapping screws and wood screws. A lock nut is a special nut with an additional locking mechanism, such as a spring washer or rubber washer, that provides additional locking against loosening and ensures that the fastener remains tight under vibration and shock conditions. A self-tapping screw is a type of fastener with self-tapping threads that is typically used to join loose materials such as metal, plastic, and wood. A wood screw is a fastener similar to a screw but specialized for wood materials, and can be screwed directly into a wood member for fastening a metal (or non-metallic) part with a through-hole to a wood member.
In short, fasteners are essential for connecting and fixing two or more parts, and are widely used in various fields.