Stainless steel standard fasteners include 12 types of parts

Stainless steel standard fasteners usually include the following 12 types of parts:

1. Bolt: a type of fastener consisting of two parts, a head and a screw (cylinder with external threads), which need to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

2. Stud: There is no head, only a type of fastener with external threads on both ends. When connecting, one end of it must be screwed into the part with internal threaded hole, the other end must pass through the part with through hole, and then the nut is screwed on, even if the two parts are tightly connected as a whole. This type of connection is called a stud connection, which is also a detachable connection. It is mainly used where one of the connected parts has a large thickness, requires a compact structure, or is not suitable for bolt connection due to frequent disassembly.

3. Screws: It is also a type of fasteners composed of two parts, the head and the screw, and can be divided into three categories according to the purpose: machine screws, set screws and special purpose screws. Machine screws are mainly used for a tightening connection between a part with a threaded hole and a part with a through hole, without the need for a nut to fit (this type of connection is called a screw connection, which is also a detachable connection; Cooperate with nut, used for fastening connection between two parts with through holes.) Set screw is mainly used to fix the relative position between two parts. Special purpose screws such as eyebolts are used for lifting parts.

4. Stainless steel nut: with internal threaded hole, the shape is generally flat hexagonal column, there are also flat square column or flat cylinder, with bolts, studs or machine screws, used to fasten the connection of two Parts, making it a whole. Special category of nuts.

High-strength self-locking nuts are a classification of self-locking nuts, which have high strength and strong reliability. It is mainly based on the introduction of European technology as a prerequisite for use in road construction machinery, mining machinery, vibration machinery and equipment, etc. At present, there are very few domestic manufacturers of such products.

Nylon self-locking nut Nylon self-locking nut is a new type of high anti-vibration and anti-loose fastening parts, which can be used in various mechanical and electrical products at a temperature of -50～100℃. At present, the demand for nylon self-locking nuts for aerospace, aviation, tanks, mining machinery, automobile transportation machinery, agricultural machinery, textile machinery, electrical products, and all kinds of machinery has increased sharply, because of its greatly high anti-vibration and anti-loose performance. In various other

Anti-loose device, and the vibration life is several times or even dozens of times longer. At present, more than 80% of accidents in mechanical equipment are caused by the loosening of fasteners, especially in mining machinery.

Using nylon self-locking nuts can prevent major accidents caused by loose fasteners.

5. Self-tapping screws: similar to machine screws, but the thread on the screw is a special self-tapping screw thread. It is used to fasten and connect two thin metal components into one piece. Small holes need to be made in the component in advance. Because this kind of screw has high hardness, it can be directly screwed into the hole of the component. Form a responsive internal thread. This type of connection is also a detachable connection.

6. Wood screws: They are also similar to machine screws, but the thread on the screw is a special rib for wood screws, which can be screwed directly into the wooden components (or parts) to use a metal with a through hole (or Non-metal) parts are fastened together with a wooden component. This connection is also a detachable connection.

7. Washer: a type of fastener with an oblate ring shape. It is placed between the supporting surface of bolts, screws or nuts and the surface of the connecting parts, which increases the contact surface area of u200bu200bthe connected parts, reduces the pressure per unit area and protects the surface of the connected parts from damage; another type of elastic washer, It can also play a role in preventing the nut from loosening.

8. Retaining ring: It can be installed in the shaft groove or hole groove of the machine and equipment to prevent the parts on the shaft or hole from moving left and right.

9. Pins: Mainly used for parts positioning, and some are also used for connecting parts, fixing parts, transmitting power or locking other fasteners.

10. Rivet: A type of fastener composed of two parts, a head and a nail shaft, used to fasten and connect two parts (or components) with through holes to make them into a whole. This type of connection is called rivet connection, or riveting for short. Belong to and non-detachable connection. Because to separate the two parts connected together, the rivets on the parts must be broken.

11. Assemblies and connection pairs: Assemblies refer to a type of fastener supplied in combination, such as combining a certain machine screw (or bolt, self-supplied screw) with a flat washer (or spring washer, lock washer) Supply; connection pair refers to a type of fastener supplied by a combination of a certain special bolt, nut and washer, such as a high-strength large hexagon head bolt connection pair for steel structures.

12. Welding nails: Because of the heterogeneous fasteners composed of light energy and nail heads (or no nail heads), they are fixedly connected to a part (or component) by welding, so that they can be connected with other stainless steel standard parts. The parts are connected.