How many are the biggest automobile fastener industries in China?

I'll tell you some better ones, depending on your batch size.

If it is big, 1, you can find Zhejiang Jinyi Industry, which is famous all over the country and the world. Its products are more expensive, but the quality is particularly stable. His subsidiary specializes in automobile standard parts, and the quality is good. 2. You can find Ningbo Donggang, and the bolts of 10.9 grade are also very good, with reasonable quality and price, and now they are better in China. 3. Hadiwei, Shanghai, this manufacturer directly provides standard parts to the public. The price is relatively cheap and the quality is ok, which is a little worse than the scale and quality of the last two companies. Compared with Li Ning, the price is cheaper and the quality is average. 4. Kowloon standard parts are of average quality.

There are many manufacturers in the market, but they are used in cars. I suggest using a relatively stable quality. If something goes wrong, it will be difficult to deal with. There are also many trading companies in the market that say they can produce even if they don't produce at all. In fact, they are all outsourced processing. You should look carefully and be careful.

There are many suggestions I gave you above, which are relatively better. I hope my suggestion is helpful to you.