Characteristics Of Fastener Structures

Bolts: Composed of a head and a cylindrical rod with external threads, they need to be used with nuts to connect two parts with through holes. They belong to detachable connections.

Studs: Headless with external threads on both ends, one end screws into a part with internal threads, while the other passes through a hole and screws into a nut. Suitable for connecting thicker parts or situations requiring frequent disassembly.

Screws: Composed of a head and a threaded rod, classified by use into machine screws (can be screwed directly into threaded holes or used with nuts), set screws (used to fix the relative position of parts), and screws for special purposes (such as eye screws).

Nuts: Have internal threaded holes, usually flat hexagonal in shape. Used in conjunction with bolts or studs to fasten components together.

Self-tapping screws: Similar to machine screws but with specialized threads, high hardness, can be screwed directly into metal components to form internal threads without pre-tapping.

Wood screws: The threaded rod has a special wood thread, can be screwed directly into wooden components, used for connecting metal parts with wooden elements.

Washers: Flat circular rings placed between the head of a bolt or screw or a nut and the surface of the connected part to increase contact area, reduce pressure, or prevent loosening.

Circlips: Installed in shaft or hole grooves to limit axial movement of parts.

Pins: Mainly used for part positioning, with some able to transmit power or provide connections.

Rivets: Composed of a head and a shank, used for permanent connections between two parts with holes; disassembly requires destruction.

Fasteners are widely used in machinery, electronics, construction, transportation, and other fields. They are highly standardized and versatile, including types made from stainless steel to meet special requirements such as corrosion resistance.