Stainless steel shoulder plug and high screw, stainless steel step plug and screw

At present, with the continuous growth of demand for communication products, higher requirements have been placed on the production capacity of equipment manufacturers, and the requirements for cost, weight, and reliability of communication products have also become increasingly stringent. In equipment assembly, pins are often used to facilitate positioning, resulting in certain costs for manufacturing and assembly. In the past, such parts have always been assembled in the form of threads. In order to ensure that the assembly height is within the specified range and prevent loosening, bar stock trucks are often used to process threads and positioning steps, and thread pin fixing glue is used in assembly, which results in high machining costs and material waste. Taking into account the above drawbacks, in order to better solve this problem, some existing production enterprises adopt the interference fit riveting method, which effectively solves the problems of material waste and looseness prevention. However, the processing accuracy of the inner diameter of the matching pin hole and the outer diameter of the pin are required to be high. Once the matching size exceeds the tolerance, secondary matching is required, wasting labor hours and increasing work delay time.

When fixing the centrifugal fan blade, due to the fact that the gasket, washer, and nut are separate components, there are more components used throughout the entire process, which is prone to omissions in component installation; Moreover, due to the relatively small volume of the gaskets, washers, and nuts, it is difficult to remove foreign objects inside the air conditioner by adjusting the gap between the centrifugal fan blades.

"Common categories
Various common screws
Various common screws (20 pieces)
a. Slotted: Minus
b. Phillips: Plus
c. Phil Slot: Straight/Cross
d. Hex Socket: hexagonal socket
e. One Way: One way (can only be locked in, not exited)
A-4: Head Code/Head Appearance
a. Flat: Flat head (after locking, the top is flush with the working part)
b. Oval: Salad head, O-head, half countersunk head
Screw Unit of measurement
Screw Unit of measurement
c. Round: Round head
d. Pan: Round flat head
e. Truss: Large round flat head
f. Hex: Hexagonal head
A-5: Finish Code/Appearance treatment
Metric Self-tapping screw: mark Tapping Type directly behind the product name
Ex: M3 x 6 – PPB, Tapping Type:
M3 Self-tapping screw, 6mm long, cross, round flat head, black plated
Generally, it is judged as using Sheet Metal or plastic components based on the product type or label
*Pitch=number of teeth per inch"

"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"

"Specification label editing and broadcasting
Presentation format:
Thread specification d=M12, nominal length L=80mm, performance level 4.8 equal length stud bolt, complete mark: GB 901 M12 × 80 [1]
Product examples:
Double headed bolts generally require surface treatment, and there are many types of surface treatment for bolts, including electroplating, blackening, oxidation, phosphating, and non electrolytic zinc sheet coating treatment. However, electroplating fasteners account for a large proportion in the actual use of fasteners. Especially widely used in industries and fields such as automobiles, tractors, household appliances, instrumentation, aerospace, communication, etc. However, for Threaded fastener, it is not only required to have certain anti-corrosion capacity in use, but also to ensure the interchangeability of threads, which can also be called screwing in here. In order to meet the dual use performance of "anti-corrosion" and "interchangeability" required in the use of Threaded fastener at the same time, it is very necessary to develop special plating standards"