If you ask about the deepest impression of China abroad, I believe half of the foreigners will think it is China's high-speed rail. Indeed, China's high-speed rail not only ranks first in the world with a total length of more than 40,000 kilometers, several streets ahead of Japan's second place, but also the construction cost is more than half cheaper than Japan's. Due to the low construction cost, many countries are willing to cooperate with my country to build high-speed rail. It can be said that China's high-speed rail is a world-renowned business card.

In 2021, my country's railway construction will be successfully completed with a total railway mileage of 150,000 kilometers and a total high-speed railway mileage of over 40,000 kilometers. According to incomplete statistics, more than 10 high-speed and intercity railway projects will be opened this year, and more than 10 new ordinary railway projects are planned to be opened. According to the current construction progress, some lines have been confirmed to open in the first half of the year, and some lines will be opened at the end of September or December. The total mileage of high-speed rail is expected to be about 1,967 kilometers in 2022.

And so far, China's high-speed rail has covered 94.7% of the country's cities with a population of more than one million. The construction of high-speed rail will not only promote the development of urban economy, but also benefit the general public. Because the high-speed rail travel time is shorter and more comfortable than the train, and the price is cheaper than the plane, many people choose to take the high-speed rail now. It can be said that the birth of high-speed rail has provided convenience for our life.

All the achievements of China's high-speed rail are based on the rapid development of China's manufacturing industry, but many of its originals are not domestically produced. During the operation of high-speed trains, the high-speed trains are constantly in contact with the rails, resulting in great friction and vibration. Ordinary screws will loose and fly out under this vibration. If you don't want to be shaken, then you need the screws and nuts to be screwed together and never loosen.

So, is there really such a screw in the world? The answer is yes. In a small business in Japan with only more than 40 employees, Hadlock launched a so-called "Never Loose Nut", which became famous all over the world for a time. It has to be said that Hadlock really controls the world's most cutting-edge nut manufacturing industry, and their "never loose nut" has also become a guest of various railway powers, and my country is no exception, and has also adopted this nut in large numbers.

Nuts produced by the company have been used on the Shinkansen, and the latter has become the best advertisement for Hardlock Industrial Nuts. You must know that the Shinkansen was once hailed as the most efficient and safest train in the world. Each train requires at least 20,000 nuts. As long as one nut is loose, the probability of accidents during the operation of the Shinkansen will be greatly increased.

The core reason why the nuts produced by Hardlock Industries can be "liked" by the Shinkansen is that the nuts produced by Hardlock Industries have the world's top technology. The nut produced is the world's first non-loosening nut in the true sense. Based on the anti-rotation nut, Hadlock Industries added a tenon design to the upper end of the nut to completely achieve the anti-loosening effect.

But Hadlock's principle of never loosening the nut is very simple, that is to use a "concave" and "convex" nut on a screw. During the machining process, the center moves slightly to act as a wedge. The concave nut above is not processed off-center, so it forms the function of a hammer to hit a wedge. In this way, the two nuts are combined into one, and the loosening problem is solved.

Over the decades, there have been countless imitators of the Hadlock Nut. However, so far, the only factory that can produce "never loose nuts" is Hadlock. This is because Hadlock has rich technical research and accumulation, and different core deviations corresponding to different sizes and materials are firmly in Hadlock's hands. Therefore, Hadlock's nut is inimitable, not even the United States and Russia.

For more than 40 years, Hardlock Industries has not just relied on this product for nothing. The overall level of manufacturing is improving, and Hardlock Industries is always one step ahead of the market and can develop new specifications ahead of time. Since the birth of the Never Loose Nut, Hardlock Industrial has been continuously improving the performance of the product, which has made Hardlock Industrial Nut highly praised by customers around the world.

Currently, such nuts are not only used in railways, but also in medical and aviation infrastructure. Many people will ask that due to the "Huawei Incident", domestic production should better avoid future production cuts. Otherwise, won't these infrastructures be "paralyzed" if production cuts occur?

Today's "Never Loose Nut" is no longer Hadlock's originality. China successfully broke Hadlock's monopoly and created China's never-loose nut, the Down Nut. This is not an imitation of Hardlock's industrial nut, but a new type of nut with a completely new design and has broken the record held by Japanese nuts in many tests. Fully comply with seismic standards, safety and reliability far better than Japan.

Therefore, even if there are any surprises in this field, we will not face the embarrassment of being "stuck in the neck". In the future, Down Nuts may evenly split the global high-end fastener market with Hardlock Industrial's Never Loose Nuts. What do you think of Down Nuts?