Q:For example, some people ask us to assemble the time zone of the flat washers of the positive and negative side, I would like to ask the installation of flat washers have positive and negative points? If yes, how to distinguish?

From the use, do not distinguish between positive and negative. From the beautiful, bright flat surface, outward

Q:Fasteners often say that the nature of galvanized oxidation is what it means

Fasteners, is a fastening connection with the application of a very wide range of mechanical parts. Fasting, widely used in industries such as energy, electronics, electrical appliances, machinery, chemical, metallurgy, mold, hydraulic, etc., in various machinery, equipment, vehicles, ships, railways, bridges, construction, structure, tools , Chemical, instrumentation and supplies, etc., can see a wide range of fasteners, is the most widely used mechanical base pieces. It is characterized by a wide variety of specifications, performance purposes vary, and standardization, serialization, the degree of generalization is also very high. Therefore, some people have a national standard of a class of fasteners called standard fasteners, or simply referred to as standard parts.

Q:Is the tail screw? If it is mainly used in what place? If not what are they different?

Normally, it should be called drilling screws, screws are the use of the object of the circular circular rotation and friction of the physical and mathematical principles, step by step to tighten the tools of the tools. Drilling screw is the front of the screw with self-tapping the head of the wood screws. Screw is thousands of years of people in the production of common inventions, according to the application field, it is the first major inventions of mankind. Drilling screws are in recent years people's new invention, also known as self-tapping screws. Main steel for connecting between the need for ordinary or high-strength bolts, plates with self-tapping screw connection. It can not be used for metal and metal bonding.

Q:Please understand the friends of the self-tapping nails, screws, nuts production process, is the manufacturer's process. The more specific the more detailed the better

This is very simple, the screw wire is generally based on the size of the screw into the back, and then according to the order processing, starting - rubbing teeth - plating - packaging on the success

Q:When do flat washers use GB95 when using GB97.1?

Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolation, to prevent loose or disperse pressure. Such components are used in many materials and structures to perform similar functions. Due to the limitation of the material and the process of the threaded fastener, the supporting surface of the bolt and the like is not large, so that the surface of the connecting piece is protected by reducing the compressive stress of the bearing surface.

Q:This screw ye use, and how to use next to the cover

This is an expansion screw. Take a suitable electric drill bit to drill a hole in the wall, and then put the sleeve into the eyes of the drill, put the screw into the sleeve, this than the ordinary screw firm.

Q:Why the screw thread more closely, spin into the more effort?

Because the length of the screw into a certain, do a certain job. The more tight the thread, the equivalent of the longer the distance rotation, power = distance × force, long distance, the need for force naturally small

Q:Is it hard to heat the fasteners?

Fasteners are also known as standard parts, which are mainly heat-treated according to the material of the product.

Q:A general set of screws have a few nuts, bolts, washers?

A screw nut a flat washer but a spring washer

Q:What is a self-tapping nail? Is it used? What are the characteristics of the shape? What is the difference with ordinary screws?

Compared with the common screw thread, in the same large diameter, the pitch is small and small diameter is slightly smaller, has been standardized. Self-tapping screw material can be divided into two kinds of carbon steel and stainless steel, carbon steel materials which are usually used in 1022 medium carbon steel. Usually used in doors and windows, metal. The head is the end of the end of the shape of the part of the formation of the formation of the surface.For thread forming and thread cutting self-tapping screws (self-tapping screws), the flat top buried, flat round countersunk, pan head, hexagonal and hexagonal wire Head of the most important, these five head type accounted for almost all 90% of self-tapping screws, the use of self-tapping screws (self-tapping screws) should first consider this.