1. We usually look at the appearance of the bolts with our eyes to see whether the electroplated black zinc of the bolts is fine, whether there are spots or not. 2. Tightness test of bolts. Clean the oil layer on the fastener surface with gasoline or cleanin...

What is Spring washer? Typically consisting of a flattened, circular- or disc-shaped piece of metal with a hole in the middle, washers are often used in conjunction with threaded fasteners. Before a threaded fastener like a screw is driven into a surface, a wa...

In life, bolts, screws, screws, etc. are often mentioned. What is the difference between them? Actually, the standard saying is that there are no screws and nuts. Screws are commonly known, and those with external threads can be called "screws". The shape of t...

If you have ever found yourself confused when trying to figure out what size nuts are needed for bolts, then you are not alone. Many different sizes can be overwhelming and confusing. When you learn that there is an American standard measurement system and a m...

Introduction to flat washer: Flat washers are usually thin parts of various shapes, which are used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. Many materials and structures have such components to perform various simil...

There are many kinds of high-strength bolts, mainly above Grade 8.8, including half thread hex bolt Grade 10.9 and full thread bolt Gr12.9 carbon steel bolts and screws High strength bolts and screws should be widely used in life. Let me introduce the usage...

On June 28, 2010, the Ministry of Commerce issued announcement No. 40 of 2010, deciding to impose anti-dumping duties on imported carbon steel fasteners originating in the European Union, with the tax rate of 6.1% to 26.0%. On September 9, 2011, the Ministry o...

On July 7, at the regular press conference held by the Ministry of Commerce, a media question was raised: in the second half of this year, high inflation, the conflict between Russia and Ukraine pushing up commodity prices and other factors will still affect t...

In the overall downturn of the market, many enterprises are also adjusting their subsequent business strategies. "In the face of this round of brutal market competition, we must firmly grasp the work of variety optimization and improvement." Liu Jianrong, Secr...