White silicone plug, screw hole decoration, rubber plug, rubber plug, water pipe plug, cover

"There are many names for bolts, and each person's name may be different. Some people call them screws, some call them bolts and nails, and some call them fasteners. Although there are so many names, the meaning is the same, they are all bolts. Bolt is a common term for fasteners. A bolt is a tool that utilizes the physical and mathematical principles of the oblique circular rotation and friction of an object to gradually tighten the mechanical components of the object. [1]
Bolts are indispensable in daily life and industrial production manufacturing, and bolts are also known as the rice of industry. It can be seen that bolts are widely used. The application scope of bolts includes: electronic products, mechanical products, digital products, power equipment, and electromechanical mechanical products. Bolts are also useful in ships, vehicles, hydraulic engineering, and even chemical experiments. Anyway, bolts are used in many places. Precise bolts used in digital products. Micro bolts used for DVDs, cameras, glasses, clocks, electronics, etc; General bolts for television, electrical products, musical instruments, furniture, etc; As for engineering, construction, and bridges, large bolts and nuts are used; Transportation equipment, airplanes, trams, cars, etc. are used with both large and small bolts. Bolts bear important tasks in industry, and as long as there is industry on Earth, the function of bolts will always be important"

Bolt threads are generally cold processed, allowing thread blanks within a certain diameter range to be formed by rubbing (rolling) the wire plate (mold) under pressure. The plastic flow line of the threaded part can be obtained without being cut off, with increased strength, high accuracy, and uniform quality, which is widely adopted. In order to produce the outer diameter of the thread for the final product, the required thread blank diameter is different because it is limited by factors such as thread accuracy and the presence or absence of coating on the material. Rolling (rubbing) thread refers to the processing method of forming thread teeth using plastic deformation. It uses a rolling (thread rolling plate) mold with the same pitch and tooth shape as the processed thread, squeezing the cylindrical screw blank while rotating it. Finally, the tooth shape on the rolling mold is transferred to the screw blank, forming the thread. The common feature of rolling (rubbing) thread processing is that there is no need to have too many rolling revolutions. If there are too many, the efficiency is low, and the surface of the thread teeth is prone to separation or disorderly threading. On the contrary, if the number of revolutions is too small, the thread diameter is easily out of circle, and the initial pressure during rolling increases abnormally, resulting in a shortened mold life. Common defects of rolling thread: surface cracks or scratches on the thread part; Unauthorized deduction; The threaded part is out of round. If these defects occur in large quantities, they will be discovered during the processing stage. If a small number of defects occur and the production process does not pay attention to them, they will circulate to users, causing trouble. Therefore, key issues related to processing conditions should be summarized and controlled during the production process.

"Spring self-locking nut
The spring clamp self-locking nut is composed of an S-shaped spring clamp and a self-locking nut. There is a clamping hole (3) for clamping the self-locking nut, a transition hole for passing through the bolt, and a guide hole for guiding the bolt on the S-shaped spring clamp. The self-locking nut is placed between the clamping hole and the transition hole (4), and is clamped in the clamping hole. This utility model uses the elastic force of a spring clip to fix the self-locking nut on the connecting plate or support component. The spring clip is not only the assembly carrier of the self-locking nut, but also the assembly tool for the self-locking nut during assembly. This structure is not only convenient for installation, but also has good reliability after installation"

Spring washers are designed for screw locking, usually single coil cylindrical spiral springs. To improve their locking function, integrated spring washers are also used. Their structure is that the inner ring of the flat washer has multiple wings, each wing folded into a spring plate. Another type of washer similar to spring washers used for backstop is a serrated lock washer. However, this type of lock washer usually has a smaller thickness and forms serrations on the inner or outer ring of the washer on a flat surface through bending. When tightening, it has less elasticity and is easy to be flattened, making the locking function still not strong enough.

"NBR nitrile rubber is the most commonly used material for rubber gaskets, with the highest cost-effectiveness. The use of FFKM perfluorinated rubber gaskets is generally in more cutting-edge fields, such as aerospace rockets. Because its price is quite expensive, but its performance is excellent and can surpass many metal materials.
For specific material information, please refer to the following:
Material name
Chemical description
English abbreviation
English alias
Acrylic butadiene rubber
Acrylonitrile butadiene rubber
NBR
Buna N
Hydrogenated nitrile rubber
Hydrogenated acrylonitrile butadiene rubber
HNBR
HNBR
EPDM adhesive
Ethylene propylene diene rubber
EPDM
EP, EPT, EPR
Chloroprene
Chloroprene rubber
CR
Neoprene
silica gel
Silicone rubber
WMQ
PVMQ
Fluorosiloxane
Fluorosilicone rubber
FVMQ
FVMQ
Acrylate
Acrylate rubber
ACM
ACM
Ethylene acrylic acid
Ethylene acrylic rubber
AEM
Vamac
Styrene butadiene
Styrene butadiene rubber
SBR
SBR
Polyurethane
Polyester/polyether urethane
AU/EU
AU/EU
Natural rubber
Natural rubber
NR
NR"