? ? ? ? Stainless steel fasteners in the market also known as standard parts, is to two or more than two parts (or components) fastening to connect, as a whole when the use of a class of mechanical parts collectively. Stainless steel fasteners consist of 12 categories:
1. rivet: it consists of two parts: rivet shell and rod. It is used to fasten the plate connecting two through holes so as to achieve the whole effect. This form of connection is called rivet joint, or riveting. Riveted joints are not removable because the rivets on the parts must be destroyed to separate the two parts that are joined together.
2. bolts: a stainless steel fastener consisting of two parts, head and screw (cylinder with outer thread), which must be fitted with nuts for fastening and connecting two parts with through holes. This form of connection is called bolted connection. If the nut is screwed down from the bolt, the two parts can be separated, so the bolt connection belongs to the detachable connection.
3. stud: a stainless steel fastener with no head and only threaded ends. When connecting, one end must be screwed into a part with an inner threaded hole, the other end through a part with a through hole, and then screw on the nut, even if the two parts are fastened and connected as a whole. This type of connection is called stud connection, and it also belongs to removable connection. The utility model is mainly used for occasions where the thickness of a connecting component is large, the structure is compact, or the bolt connection is not suitable for frequent disassembly. ,
4.: nut with inner thread hole, the shape is flat six prism, there is a flat square cylindrical or flat cylindrical, with bolts, studs or machine screws for fastening connecting two parts, make it become a whole.
5. screws: it is also a kind of stainless steel fasteners made up of two parts: head and screw. They can be divided into three kinds according to their use: machine screws, fastening screws and special purpose screws. The machine is mainly used for fastening a screw thread hole and fastening parts, connection between a part with a through hole, do not need to match the nut (this connection is called screw connection, also belongs to the detachable connection; also can be matched with a nut for two with a through hole between the parts are tightly connected.) A fastening screw is used primarily to secure the relative position between two parts. Special purpose screws, such as rings, screws, etc. for lifting parts.
6. self tapping screw: similar to machine screw, but screw thread is screw thread for special self tapping screw. For fastening two thin metal components, make it become a whole, members need to make holes, because the screw has high hardness, can be directly screwed into the member Kong Zhong, the response of the internal thread forming member. This form of connection is also removable.
7. welding studs: dissimilar stainless steel nuts consisting of light energy and nail heads (or studs) are welded together to a part (or member) so as to connect with other parts.
8. wood screw machine screw is similar, but the thread on the screw for wood screws with the special rib, can be directly screwed into the wooden components (or parts), used to put a hole with the metal (or metal parts) with a wooden component fastening together. This connection also belongs to removable connections.
The 9. is in the shape of a washer: stainless steel fasteners oblate ring. Between the supporting surface is arranged on the bolts, screws or nuts and connecting parts surface, plays an increasing connecting parts contact surface area, reduce the pressure per unit area and protect the connected part surface is not damaged; another kind of elastic washer, also prevents the nut loosening.
10. ring: for the machine or equipment in the shaft slot or slot, play a role in preventing the shaft or hole on the left and right movement.
11. pin: mainly for parts positioning, and some can also be used for parts connection, fixed parts, transmission power or locking other stainless steel standard parts.
12. assembly and connection side assembly: refers to a kind of stainless steel nut combination supply, such as a machine (or screw bolts, screws and washers (self) or spring washers, lock washers) combined supply connection refers to a kind of side; some special stainless steel fasteners bolts, nuts and washers combination supply the steel structure with high strength, such as the six hexagon head bolt.
