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Drilling Guidance

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Frequently Asked Questions

  • What are the advantages of self-drilling screws than ordinary screws

    As a new star in the screw category in recent years, drill tail screws have been favored by major industries once they were launched. Compared with ordinary screws, self-drilling screws have incompara...

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  • Tracking down the cause of stainless steel screw fracture

    For the fracture of ferrous screws, it is very easy to encounter in practical applications. However, the fracture of stainless steel screws is rarely seen. The reason is that the material of the stain...

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  • It turns out that stainless steel will also fall in love with magnets

    In life, everyone will have such a perception: iron can be attracted by magnets, and stainless steel cannot be attracted by magnets. This is a false perception to judge whether the stainless steel pro...

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  • Why do some processes in the product must use stainless steel screws

    Everyone in the fastener circle knows that stainless steel screws are more expensive than ordinary materials, especially some food or medical grade screws. However, you get what you pay for, and stain...

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  • The difference between a locking screw and a set screw

    Triangular thread self-tapping locking screws belong to a kind of self-tapping screws. The difference is that their threads are arc-shaped triangular cross-sections. Because of this feature, the trian...

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  • How to unscrew a broken screw?

    Large and small screws can be seen everywhere in life. Therefore, it is inevitable that we will always encounter the situation of screwing and screwing in our lives. At this time, it's more awkward, y...

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  • Ordinary bolt connection problem

    (1) Types and uses of ordinary bolts  According to the difference in shape, ordinary bolts can be divided into three types, namely hexagonal bolts, stud bolts and anchor bolts.  ① Hexagon bolts: Accor...

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  • You don’t know the secrets of hydrogen embrittlement of fasteners

    High-strength fasteners are often used in important occasions, such as bridges, vehicle engines, and spacecraft. The failure of these fasteners will lead to catastrophic consequences. Preventing failu...

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  • Why do salt spray experiments after screw plating?

    Salt spray test and connection with reality:Salt spray test is an environmental test that mainly uses artificially simulated salt spray environmental conditions created by salt spray test equipment to...

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  • How to measure screw size

    Screws are connecting fasteners that are inseparable from all major fields. Many major accidents are caused by the failure of fasteners, and it can be seen that small fasteners play an important role ...

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  • What kinds of waterproof washers are commonly used for screws?

    PVC gasket (polyvinyl chloride):Generally transparent or translucent, it has strong resistance to oxidants, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acid...

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  • Fastener hydrogen embrittlement problem

    In the manufacturing process and service environment of threaded fasteners, under the reaction of cathodic protection or corrosion, the matrix of steel or other metals may be penetrated by hydrogen at...

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  • Several misunderstandings about fasteners

    1. thickened nutSome people often mistakenly believe that thickening the nut can increase the number of working turns of the thread, thereby improving the reliability of the coupling. In fact, the thi...

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  • How long can UNITEK stainless steel long drill tail nails be?

    We all know that long tail screws (drilling screws with a long length) are difficult to make, because the smaller the wire diameter and the longer the length of the screw, the more likely it is to ben...

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  • About the problem of tail sticking

    Does the small adhesion in the tail part of the drill nail affect the use of the tapping board? This is a question that many customers will ask. Many customers think that the adhesion of the drill tai...

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  • Customization process of non-standard screws (non-standard parts)

    Non-standard screws refer to screws that are not designed and produced according to standard parameters. Many customers who customize non-standard screws for the first time will have a question: Why i...

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  • Galvanized drill tail nails become black and dark in a few days. Is it really inferior?

    (酸性的雨...

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  • The use of stainless steel self-drilling nails pays attention to "check the seat"

    Drilling nails of different product specifications can be used in different system environments to give full play to their maximum performance. It is like stainless steel drill nails: SUS304, SUS316 a...

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  • The phenomenon that the stainless steel screw can't come out

    Stainless steel screws lock up during use and are difficult to withdraw. This kind of phenomenon is very common on stainless steel screws. The specific reason is mainly that the stainless steel materi...

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  • Stainless steel bolts are easy to lock up

    Because stainless steel has its own anti-rust properties, when the metal surface is damaged, an oxide protective layer will be formed on the damaged part to prevent further rust. When the stainless st...

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  • How long does it take to order a mold for stainless steel non-standard screws

    The delivery date of stainless steel non-standard screws is a pain point for many screw manufacturers. The customization of a non-standard screw is really time-consuming. From raw materials, to custom...

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  • Common misunderstandings in the use of standard bolts

    Substituting coarse for fineBecause the fine-tooth standard parts occupy a small space, have the advantages of high strength, good self-locking performance, and strong ability to withstand vibration a...

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  • Measures to avoid screw locking

    Preventive measures and methods to avoid screw locking:1. Choose the right product: Before use, confirm whether the mechanical properties of the product meet the requirements of use, such as the tensi...

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  • What is the service life of 410 products

    410 material is characterized by fast rusting, slow rusting speed, and the corrosion speed is only 1/150 of that of ordinary carbon steel. Different from the rust of carbon steel, the rust of 410 is f...

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  • The scope of use of 410 stainless steel self-drilling screws

    The scope of use of 410 stainless steel self-drilling screw1. Drilling tail No. 2 with diameter #6 (3.5) is guaranteed to be able to penetrate 2.5mm thick carbon steel plate (iron plate), and 2.6-5mm ...

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