3.5 mm nuts and bolts
3.5 mm nuts and bolts are screwed together as a part to play a role in tightening, which is an element that must be used in all manufacturing machinery. According to different materials, nuts are divided into carbon steel, stainless steel, non-ferrous metals (such as copper) and other major types.
Nuts are parts that tightly connect mechanical equipment. Only nuts and bolts of the same specification can be connected together, and they are tightly connected by the inner thread. Nuts correspond to different national standard numbers according to product attributes, and can be divided into ordinary, non-standard, American, English, German, (old) national standard, and new national standard. Different sizes, different threads are divided into different specifications.
3.5 mm nuts and bolts are small parts. Although the products are small, they require considerable technology to produce better results. We are a professional hardware product manufacturer with experienced technicians and advanced modern equipment, specializing in hardware products such as anchors, screws, bolts, nuts and other tools. Our products are exported to many countries. With high-quality products, reasonable prices and good service, we have gained trust among customers. We believe that we can become your long-term partner.
DIN 439 DIN 936
Class 4,5,6,8,10,12;Grade 2 ,Grade 5;SUS 304,SUS 316
Zinc Plated, Hot-galvanized, Plain, Black,Chrome ,Cadmium,Teflon,Dacromet
Carbon Steel,Alloy Steel,Stainless Steel
ISO 9001:2008, ISO/TS16949:2009
Automotive Industry, General Industry, Heavy Industry, Mining, Oil & Gas
1. High-quality products. Quality is our foundation. Our company strictly abides by the ISO9001 system, our products have passed multiple standards, and our factory has a strong production capacity.
The manufacturing process of general nuts has the following steps: ① stamping of steel materials ② tapping (thread processing) ③ heat treatment (general nuts with higher grades require heat treatment, nuts with lower grades do not require heat treatment process) ④ after the above production process After the nut has been basically formed. ⑤ After the above steps, the nut still needs the final process-surface treatment (that is, the surface treatment method we require, such as blue and white zinc, color zinc, blackening, etc.).
We have our own clear and efficient process, and strive to be more rigorous in quality.
2. Good service. Whether it is pre-sale or after-sale, we always put the customer first and provide good service. We take every customer seriously, if you have any questions, you can send them to us, we will reply you as soon as possible. If you are not sure how to choose products, we can provide you with technical support, and will provide high quality and the most competitive prices.Since we have thousands of products on sale, it is difficult to send you all catalogs and price lists. If you are interested, please talk with us in detail, we can provide customized production.
What are the treatment methods for the nut surface?
The manufacturer of high-strength bolts judges and analyzes the surface treatment method of the nut. The quality judgment of the surface treatment of the nut is mainly to check whether the anti-corrosion ability of the nut is effectively increased. After the surface treatment of the nut, the appearance of the nut will be more beautiful, and the corrosion resistance of the nut will be improved, thereby increasing the usability and reliability of the nut. There are three ways to deal with nuts:
① When electroplating nuts, everyone knows that the nut will rust when used for a long time.Electroplating is to soak this part of the nut in the aqueous solution.This aqueous solution is specific.This aqueous solution contains a metal compound. The surface of the nut can be treated by passing current. Nut plating generally includes zinc plating, copper, nickel, chromium, copper-nickel alloy, etc.
② The nut is heated, which is hot dip galvanized.We know that some nuts are made of carbon steel. The nut made of this carbon steel is immersed in the liquid of molten zinc and then heated. The temperature must be heated. Higher, only this is conducive to surface treatment, the commonly used heating temperature is 510 degrees Celsius, the use of nuts for a long time will also produce a substance such as iron-zinc alloy, after heating, this substance will change and change to no The iron-containing purified zinc completes the surface treatment of the nut, which increases the service life and corrosion resistance of the nut.
③ The third method is to use mechanical plating to carry out the surface treatment of the nut. Simply speaking, mechanical plating is accomplished by combining a physical property and a chemical property. Then, the nut is cold-treated, and a coating will appear on the surface of the nut after the treatment. This coating protects the nut and improves the service life and corrosion resistance of the nut. This is called coating, this method is mainly used for screws and nuts.