What are the fastener parts?
It usually includes the following 12 parts:
Bolt: A type of fastener consisting of a head and a threaded rod (externally threaded cylinder), intended to mate with a nut for the secure attachment of two parts with through holes. This form of connection is called bolting. If the nut is unscrewed from the bolt, it is possible to separate the two parts, so the bolt connection belongs to the detachable connection.
Studs: A type of fastener that has no head and is externally threaded on both ends. When connecting, one end must be screwed into a part with a female threaded hole and the other end through a part with a through hole, then screw on the nut, even though the two parts are fastened together as one piece. This form of connection is called a stud connection, which is also a detachable connection. Mainly used for the connected parts of a larger thickness, requiring compact structure, or due to frequent disassembly, should not be used bolted occasion.
Screw: also by the head and screw two parts of a class of fasteners, according to use can be divided into three categories: machine screws, set screws and special purpose screws. The machine screw is mainly used for the fastening of a part with a fixed threaded hole and a part with a through hole without the need of a nut (this type of connection is called a screw connection and also a detachable connection; Mating with nuts for fastening connection between two parts with through holes.) Set screws are mainly used to secure the relative position between two parts. For example, there are special purpose screws such as eyebolts for lifting parts.
Nut: with internal thread hole, the shape is generally showed flat hexagonal column, also has a flat square columnar or oblate cylindrical, with bolts, studs or machine screws, used to fasten the two parts, making it One whole.
5. Self-tapping screws: similar to the machine screws, but the threads on the screw are special self-tapping screws. For fastening the two thin metal parts, making it a whole, the components need to make small holes in advance, because of this screw has a high hardness, can be directly screwed into the hole member, so that the member Form the internal thread of response
6. Wood Screws: It is also similar to machine screws, but the threads on the screws are threaded for special wood screws that can be screwed directly into the woodwork (or parts) for a metal (or non-metal) The parts are fastened together with a wooden component. This connection also belongs to the detachable connection.
7. Washer: Oblate ring in the shape of a type of fastener. Placed in the bolt, screw or nut between the support surface and the surface of the connecting parts play the role of increasing the contact surface area of the connected parts, reducing the pressure per unit area and protect the surface of the connected parts from being damaged; another type of elastic washers, Can also play a role in preventing the nut back to loose
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