Views: 50 Author: Site Editor Publish Time: 2023-10-27 Origin: Site
Fasteners are two or more parts (or components) tightly connected to become a whole when used in a class of mechanical parts of the general term. It is also known as standard parts in the market.
It usually includes the following 8 types of parts:
Bolts, studs, screws, nuts, self-tapping screws, wood screws, washers, retaining rings, rivets.
Bolt: by the head and screw (with external threads of the cylinder) composed of two parts of a class of fasteners, need to cooperate with the nut, used to fasten the connection of two parts with a through hole. This form of connection is called bolt connection. Such as the nut from the bolt to spin down, and can make the two parts separate, so the bolt connection is a removable connection.
Stud: no head, only the two ends of a class of fasteners with external threads. Connection, it must be screwed into one end with internally threaded holes in the parts, the other end through the parts with through holes, and then screwed on the nut, even if the two parts are tightly connected as a whole. This type of connection is called a stud connection and is also a removable connection. Mainly used for one of the connected parts of greater thickness, compact structure, or due to frequent disassembly, should not be used for bolt connection occasions.
Screws: also by the head and screw two parts of a class of fasteners, according to the use can be divided into three categories: steel screws, fastening screws and special purpose screws. Machine screws are mainly used for a tightening threaded holes in the parts, and a through-hole parts with a fastening connection between the parts, do not need to nut with (this form of connection is called screw connection, also belongs to the removable connection; can also be used with the nut with the two through-hole parts with a fastening connection between the parts.) Set screws are mainly used to fix the relative position between two parts. Special-purpose screws such as ring screws for lifting parts.
Nuts: with internally threaded holes, the shape is generally shown as a flat hexagonal column, there are flat square or flat cylindrical, with bolts, studs or steel screws, used to fasten the connection between the two parts, so that it becomes a whole piece.
Self-tapping screws: similar to screws, but the threads on the screw for special self-tapping screws with threads. Used to fasten the connection of two thin metal components, so that it becomes a whole, components need to be made beforehand on the hole, because this screw has a high hardness, can be directly screwed into the components of the hole, so that the components in the formation of the corresponding internal threads. This form of connection also belongs to the removable connection.
Wood screws: also similar to the screws, but the thread on the screw for the special wood screw threads, can be screwed directly into the wooden components (or parts), used to a metal (or non-metallic) with through-hole parts and a wooden component fastening connection together. This connection is also a removable connection.
Washers: the shape of the shape of a flat circular ring of a class of fasteners. Placed on the bolt, screw or nut support surface and connect the parts between the surface, play a role in increasing the surface area of the parts being connected to contact, reduce the pressure per unit area and protect the surface of the parts being connected to the role of damage; another type of elasticity of the washer, but also play a role in preventing the nut back to the role of loose.
Retaining ring: for installation in steel structures, equipment, shaft groove or hole groove, play a role in preventing the shaft or hole on the parts of the left and right movement.
Rivets: by the head and the nail rod composed of two parts of a class of fasteners, used to fasten the connection of two parts with holes (or components), so that it becomes a whole piece. This form of connection is called riveted connection, referred to as riveting. Belong to the non-removable connection. Because to make the two parts connected together to separate, must destroy the rivets on the parts.
South of Ximingyang Village, Linmingguan Town, Yongnian District, Handan City, Hebei Province, China