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  • Hot forged technology of big bolt and nut

    Hot forged technology of big bolt and nut

    Hot forged technology of bolts and hex nuts During hot upsetting, the billet is heated to the temperature above the metal recrystallization point by induction heating or in the forging furnace or oven. This extreme high temperature is necessary to avoid strain hardening of metals during deformati...
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  • Why there is no screw mark on the new car

    Why there is no screw mark on the new car

    After the car leaves the factory, will the screws leave traces as long as they are repaired? No!!!!!!! sometimes the screws will not leave traces after twisting. More than 20 years ago, I found that some home appliance maintenance personnel would not leave any marks when removing the screws (retu...
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  • The use and grade of hexagon head bolt

    The use and grade of hexagon head bolt

    Use of hexagon bolt Hexagon screws and hex bolt, standard parts and fasteners are widely used in the production, installation and maintenance of various mechanical equipment, electronic products, communication equipment, furniture equipment, construction industry and other industries. The outer h...
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  • Introduction to raw materials for producing high-strength bolts

    Introduction to raw materials for producing high-strength bolts

    We distinguish low carbon steel, medium carbon steel, high carbon steel and alloy steel according to the carbon content in carbon steel. 1 Low carbon steel C% ≤ 0.25% is generally called A3 steel in China. It is basically called 10081015181022 abroad. It is mainly used for Grade 4.8 bolts, Grade ...
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  • Jiulonghu Town, Ningbo, Zhejiang Province: Home of Fasteners

    Jiulonghu Town, Ningbo, Zhejiang Province: Home of Fasteners

    The fastener industry in Jiulonghu Town has obvious characteristics. There are nearly 100 fastener enterprises in Zhenhai District, of which 90% are enterprises in Jiulonghu Town, and the annual output value accounts for one fourth of Ningbo City and one sixteenth of the country. In the first hal...
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  • How to inspect high strength bolts?

    How to inspect high strength bolts?

    The quality inspection of high-strength bolts can generally be divided into two stages: one is the processing process inspection based on the production process, and the other is the quality inspection after the high-strength bolts are tightened. These two inspections are very important, but one ...
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  • International Hardware Exhibition in Cologne, Germany

    International Hardware Exhibition in Cologne, Germany

    From September 25 to 28, 2022, the biennial Cologne International Hardware Exhibition held was at the Cologne International Exhibition Center. About 1400 exhibitors from 50 countries and regions will show their innovative achievements, including tools, accessories, fasteners, connectors, DIY prod...
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  • How to test hex bolts

    How to test hex bolts

      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 cleaning agent, soak it in 3% neutral c...
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  • The Purpose of spring Washers and Why They’re Used With Fasteners

    The Purpose of spring Washers and Why They’re Used With Fasteners

    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 washer may be placed through the end. T...
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  • What is a stud bolt?

    What is a stud bolt?

    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 the nut is usually hexagon...
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  • How to Measure The Size of a Nut

    How to Measure The Size of a Nut

    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 metric measurement system, you may giv...
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  • What is a plain washer?

    What is a plain washer?

    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 similar functions. Limited by the material...
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  • How To Remove A Stripped Hex Screw

    A stripped hex screw can prevent you from removing it and carrying on with your project, but it doesn’t need to. You can remove a stripped hex screw in several ways, and some of them are as simple as using a pair of pliers. Whether you use a screw extractor, a grinding disk, or pliers, let’s take...
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  • China will continue to impose anti-dumping duties on imported carbon steel fasteners originating in the European Union and the United Kingdom

    China will continue to impose anti-dumping duties on imported carbon steel fasteners originating in the European Union and the United Kingdom

    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 of Commerce issued announcement No. 56...
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  • MOFCOM talks about the foreign trade environment in the second half of the year

    MOFCOM talks about the foreign trade environment in the second half of the year

    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 the global economic outlook. What is t...
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  • The steel market may rebound slightly due to shock in July

    The steel market may rebound slightly due to shock in July

    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, Secretary of the Party commit...
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