Screws, bolts, and threaded rods are threaded fasteners. In daily life, screws are a common term for these fasteners, including bolts, screws, nuts, etc. But in fact, they have different structures and uses.
Bolts are a type of fastener consisting of a head and a screw, and are usually used in conjunction with nuts. Bolts can connect two parts with through holes. This connection method is called a bolt connection. If you remove the nut, the two parts can be separated, so the bolt connection is removable.
Unlike bolts, studs have no head, only a type of fastener with threads on both ends. When connecting, one end must be screwed into the part with an internal thread hole, the other end must pass through the part with a through hole, and then the nut must be screwed on to achieve tightening. This type of connection is called a stud connection and is also removable. Studs are mainly used for parts with larger thickness or in situations where disassembly is frequent, and are not suitable for bolt connection.
Screws are also a type of fastener consisting of a head and a screw. According to different uses, they can be divided into three categories: machine screws, set screws and special purpose screws. Machine screws are mainly used to tighten parts with threaded holes and usually do not need to be used with nuts. For an alternative connection method, machine screws can be used with nuts to connect two parts with through holes. Set screws are used to fix the relative position between two parts, while special-purpose screws can be designed into different shapes as needed, such as eye screws, etc.
The nut is a part with an internal threaded hole, and its shape is generally a flat hexagonal cylinder, a flat square cylinder or a flat cylindrical shape. Nuts are often used in conjunction with bolts, studs, or machine screws to join two parts and make them into a whole.
In addition to differences in structure and purpose, bolts, studs and screws also have different mechanical properties. The mechanical properties of stainless steel bolts, studs and screws mainly include tensile strength, elongation stress, elongation after break, etc. These properties are crucial to the selection and use of stainless steel fasteners.
To sum up, although screws are a common term for fasteners, in fact different fasteners have different structures and uses. Selecting appropriate fasteners and understanding their mechanical properties can ensure that the fastened connections of parts are firm and reliable.
