What is the Purpose of Philips Head Screws

  Philips head screws are a fundamental component in a wide range of construction and manufacturing projects. Known for their cross-shaped slots on the head, these screws are designed to be driven with a Philips screwdriver, which fits snugly into the recesses of the screw head. The design allows for more torque to be applied during installation compared to traditional flat-head screws, making them a preferred choice in various applications.Therefore, custom screw Only then will more and more pump owners cheer for it and spread the value and function of the brand. https://shwhardware.com

  

  philips head screws

  

  Key Uses and Benefits

  

  1.Improved Torque and Grip: The cross-shaped design of Philips head screws allows for better torque distribution, reducing the likelihood of the screwdriver slipping out of the screw head during installation. This design is especially useful in situations requiring a secure and tight fit, such as in furniture assembly or electronic device manufacturing.

  

  2.Versatility Across Materials: Philips head screws are used in multiple materials, including wood, metal, and plastic. This versatility makes them a go-to fastener in different industries, from automotive to home improvement.

  

  3.Ease of Use: One of the most significant advantages of Philips head screws is their ease of use. The design ensures that the screwdriver remains centered on the screw head, reducing the risk of damaging the screw or the material it is being driven into. This makes Philips head screws particularly user-friendly for DIY enthusiasts and professionals alike.

  

  4.Widely Available and Standardized: Philips head screws are standardized and widely available in various sizes and materials, ensuring that they can be used for a vast array of applications. Their standardization also means that replacement screws are easy to find, making repairs and adjustments straightforward.

  

  philips head screws

  

  Common Applications

  

  Furniture Assembly: The reliable grip and torque of Philips head screws make them ideal for assembling furniture, where a secure fit is essential to ensure the stability and longevity of the pieces.

  

  Electronic Devices: In electronics, where precision and security are paramount, Philips head screws are often used to assemble components, offering a secure fit without damaging delicate parts.

  

  Automotive Industry: The automotive industry relies on Philips head screws for various applications, including securing panels, components, and interior fittings, where durability and reliability are crucial.

  

  Philips head screws have become an indispensable tool in many industries due to their unique design and practical benefits. Their widespread use in construction, manufacturing, and everyday DIY projects speaks to their reliability and effectiveness as a fastener. Whether you’re building a piece of furniture, assembling an electronic device, or working on your car, Philips head screws provide the strength, grip, and ease of use you need to get the job done right.

Why the V3 Smart Sonic Electric Toothbrush is a Game-Changer for Dental Health

  In today¨s fast-paced world, dental health often takes a backseat to our busy schedules. The V3 smart sonic electric toothbrush, available on ximalong brush, is set to change that. Designed with advanced sonic technology, the V3 toothbrush revolutionizes how we approach oral hygiene, ensuring a deep clean that manual toothbrushes simply cannot achieve.As can be seen from the new data, kids electric toothbrush The market influence is also growing, and the product share is also relatively increasing, which has great potential in the future. https://www.21brush.com

  

  Superior Cleaning Power

  

  The V3 smart sonic electric toothbrush uses high-frequency vibrations to remove plaque and bacteria more effectively than traditional toothbrushes. With up to 40,000 brush strokes per minute, this toothbrush ensures thorough cleaning of hard-to-reach areas in your mouth. Its sonic technology drives fluids between teeth and along the gum line, where bacteria often reside. This results in a deeper clean, reducing the risk of gum disease and cavities.

  

  Personalized Brushing Experience

  

  What sets the V3 Smart Sonic apart from other toothbrushes is its customizable brushing modes. It comes equipped with multiple settings that cater to different oral care needs, such as whitening, sensitive teeth, or deep cleaning. This feature makes it ideal for people with specific dental concerns or those who want a versatile tool to enhance their dental health routine.

  

  V3 smart sonic electric toothbrush

  

  Built-In Smart Features

  

  The V3 Smart Sonic Electric Toothbrush offers smart brushing features like a 2-minute timer and 30-second interval reminders, ensuring you follow the dentist-recommended brushing time. It also features an automatic power-off function and pressure sensors that prevent users from brushing too hard, protecting your gums from damage. These innovations make the V3 toothbrush not only effective but also user-friendly, offering a superior brushing experience.

  

  Long Battery Life and Portability

  

  The V3 toothbrush is equipped with a long-lasting rechargeable battery that can last up to several weeks on a single charge, making it perfect for travel. It also comes with a convenient Type-C charging port, which ensures faster and more efficient charging compared to standard electric toothbrushes.

  

  Waterproof and Durable Design

  

  Designed with IPX7 waterproof technology, the V3 Smart Sonic Electric Toothbrush is built for durability, even in wet environments like bathrooms or showers. Its sleek, ergonomic design offers comfort while brushing and is made from high-quality materials that ensure long-term use without compromising on performance.

  

  V3 smart sonic electric toothbrush

  

  Why You Should Make the Switch

  

  Switching to the V3 Smart Sonic Electric Toothbrush is a smart investment in your dental health. Its advanced features, from sonic cleaning power to smart timers and customization options, make it a game-changer for anyone looking to improve their oral hygiene routine. Whether you’re focused on preventing plaque buildup, whitening your teeth, or taking extra care of sensitive gums, the V3 toothbrush has you covered.

  

  For a better, healthier smile, consider upgrading your oral care routine with the V3 Smart Sonic Electric Toothbrush. It¨s not just a toothbrush!it¨s a complete dental care solution designed to give you the best possible results every time you brush.

What Is PSTN Alarm System

  A PSTN (Public Switched Telephone Network) alarm system is a security solution that uses traditional landline telephone networks to transmit alarm signals to a monitoring center. This type of system has been widely used in residential and commercial security due to its reliability and widespread infrastructure.By comparison, it can be seen that passive infrared sensor It has certain advantages and great cost performance. https://www.sunlit-tech.com

  

  How PSTN Alarm Systems Work

  

  A PSTN alarm system is connected to a telephone line. When an alarm is triggered, the system sends a signal through the telephone line to a monitoring center or directly to a user¨s phone. This signal alerts the designated parties of a potential security breach, enabling a quick response.

  

  GSM PSTN Alarm System

  

  Combining the reliability of PSTN with the flexibility of GSM (Global System for Mobile Communications), a GSM PSTN alarm system enhances security by providing multiple communication channels. This hybrid system uses both a traditional telephone line and a GSM network to ensure alarm signals are always transmitted, even if one network fails.

  

  

  Advantages of GSM PSTN Alarm Systems

  

  Redundancy: The dual network system ensures that alarm signals are transmitted even if one network is down.

  

  Remote Access: GSM integration allows users to control and monitor the alarm system remotely via mobile phones.

  

  Flexibility: Suitable for areas without reliable landline service as the GSM component can handle communication.

  

  Choosing the Right Alarm System

  

  When selecting between a PSTN alarm system and a PSTN GSM alarm system, consider the following factors:

  

  Reliability: Traditional PSTN systems are highly reliable but can be compromised if the telephone line is cut.

  

  Coverage: GSM systems provide better coverage in areas without reliable landline access.

  

  Cost: PSTN systems are generally less expensive, but GSM systems offer more features and flexibility.

  

  Features: GSM systems often come with advanced features like remote monitoring, control, and notifications.

  

  Conclusion:

  

  PSTN alarm systems offer reliable security through established landline networks, while GSM PSTN alarm systems provide enhanced flexibility and redundancy by combining traditional and mobile communication methods. Depending on your security needs and location, either system could be an effective solution to ensure safety and peace of mind.

Elevate Your Oral Care with the T6 Electric Toothbrush High Quality and Advanced Features

  When it comes to maintaining optimal oral hygiene, choosing the right toothbrush can make a significant difference. The T6 electric toothbrush by Ximalong stands out as an exceptional choice for those seeking both quality and innovation in their dental care routine. This article explores the standout features of the T6 toothbrush, its high-quality construction, and how it compares to other ultrasonic toothbrushes on the market.Today, people are interested in high quality tooth brush There are also many dependencies, and the expectations for products are getting higher and higher. https://www.21brush.com

  

  T6 Electric Toothbrush: An Overview

  

  The T6 electric toothbrush is engineered for superior performance, combining modern technology with user-centric design. As a high-quality toothbrush, it offers a range of advanced features that enhance brushing efficiency and overall oral health.

  

  T6 electric toothbrush

  

  Key Features of the T6 Electric Toothbrush

  

  1.Advanced Sonic Technology:

  

  The T6 toothbrush utilizes a powerful sonic motor with a vibration frequency of 42,000 times per minute. This high-frequency vibration ensures a thorough and effective clean, reaching areas that traditional manual brushing might miss.

  

  2.IPX7 Waterproof Rating:

  

  Designed with durability in mind, the T6 toothbrush boasts an IPX7 waterproof rating. This means it can be safely used in the shower or rinsed under running water without compromising its functionality or longevity.

  

  3.Long Battery Life:

  

  Equipped with a 2000 mAh lithium battery, the T6 toothbrush offers an impressive standby time of up to 200 days on a single charge. This extended battery life ensures that users can rely on the toothbrush for long-term use without frequent recharging.

  

  4.Magnetic Levitation Sonic Motor:

  

  The toothbrush features a magnetic levitation sonic motor, which contributes to its quiet operation. With noise levels +56 dB, users can enjoy a peaceful brushing experience without the distraction of loud motor sounds.

  

  T6 electric toothbrush

  

  5.Customizable Brushing Modes:

  

  The T6 toothbrush provides options for moderate strength and soft brushing modes, catering to different dental needs and preferences. This versatility allows users to select the mode that best suits their oral health requirements.

  

  6.High-Quality Brush Head:

  

  The brush head of the T6 electric toothbrush is designed with silicone-covered fine bristles, ensuring a gentle yet effective cleaning action. The bristles are crafted to reach into the crevices between teeth and along the gum line, promoting better oral hygiene.

  

  7.Elegant Design and Materials:

  

  The toothbrush features a sleek and modern design with a combination of ABS and PC materials. Available in various colors including black, white, cold blue, deep blue, and cold green, it adds a touch of style to your daily routine.

  

  8.Compact and Convenient:

  

  With dimensions of 248mm26mm26mm and a packing size of 260mm70mm68mm, the T6 toothbrush is compact and easy to store or travel with. Its ergonomic design fits comfortably in hand, enhancing ease of use.

How Can Wired PIR Motion Sensors Help Reduce False Alarms

  False alarms can undermine the effectiveness of security systems, but wired PIR (Passive Infrared) motion sensors offer a reliable solution. Here¨s how these sensors help minimize false alarms and enhance your security setup.However, in other words, we should know more about it. wired PIR motion sensor The law of development has brought new vitality to the whole industry and revitalized the market. https://www.sunlit-tech.com

  

  

  1. Why Choose Wired PIR Motion Sensors?

  

  Wired PIR motion sensors detect infrared radiation changes to identify movement. Unlike wireless sensors, they have a stable physical connection that often results in more reliable performance.

  

  Advantages of Wired PIR Motion Sensors:

  

  Consistent Performance: A wired connection is less prone to interference compared to wireless signals, leading to fewer false alarms.

  

  No Battery Issues: Wired sensors don’t rely on batteries, so you avoid issues related to power failure.

  

  2. How Wired PIR Motion Sensors Reduce False Alarms

  

  Improved Detection Accuracy

  

  High Sensitivity: Wired pir motion sensor alarm can accurately detect movement and adjust sensitivity to avoid false alarms from minor disturbances.

  

  Advanced Features: Many models include dual-technology detection or pet-immune settings to further reduce false alarms.

  

  Reduced Interference

  

  Stable Signals: The physical wiring avoids issues with signal degradation and interference from other electronics.

  

  Reliable Operation: Less affected by environmental factors, ensuring consistent performance.

  

  Proper Installation and Calibration

  

  Optimal Placement: Install sensors in strategic locations to avoid triggering by non-threatening movements.

  

  Adjustable Settings: Calibrate sensitivity and range to fit the specific needs of your environment.

  

  Regular Maintenance

  

  Routine Cleaning: Keep sensors free from dust and debris for accurate performance.

  

  System Checks: Regular testing helps catch and fix potential issues early.

  

  Wired PIR motion sensors offer a reliable way to reduce false alarms and enhance security. Their stable connection, accurate detection, and ease of maintenance make them a valuable choice for effective security solutions. By integrating these sensors into your security system, you can achieve more reliable protection and fewer disruptions.

How do security X-ray machines distinguish between explosives, drugs, guns, knives and other dangerou

  As the economy develops more and more, people’s living standards improve and their requirements for security are getting higher and higher. At the same time, due to factors such as wars in the third world, terrorists and extremists, domestic airports, railway stations and mass gathering places are equipped with more and more high-end security equipment.For the immediate pressure, walk through metal detector With its own coping style, it can break the predicament and usher in a new life through the quality of the product itself. https://secuzoan.com/

  

  The performance of security inspection equipment has improved a lot compared with previous years. Security inspection X-ray machines are essential equipment for security inspection channels. How this equipment can distinguish dangerous items such as explosives, drugs, guns, knives, etc., we need to start with the principle of security inspection machines.

  

  x-ray machines

  

  ZA5030A

  

  The security inspection machine is an electronic device that uses a conveyor belt to send the checked luggage into the X-ray inspection channel to complete the inspection. When the luggage enters the X-ray inspection channel, it will block the package detection sensor, and the detection signal will be sent to the system control part, generating an X-ray trigger signal, triggering the X-ray source to emit an X-ray beam.

  

  The X-ray beam passes through the inspected objects on the conveyor belt, and the X-rays are absorbed by the inspected objects and finally bombard the semiconductor detector installed in the channel. The detector converts the X-rays into signals, and these very weak signals are amplified and sent to the signal processing chassis for further processing. After these signals are processed, they are displayed on the display screen.

  

  ”No matter how many layers a package has, X-rays can penetrate it and display the items in the package layer by layer.” Dangerous items are identified by different colors. Multi-energy colored organic matter is displayed in orange, inorganic matter is displayed in blue, and mixtures are displayed in green. High energy/low energy are switched to display. High energy displays metals, etc., and low energy displays non-metals. In the image display system, the X-ray sensor L-shaped photodiode array detector (multiple energies are optional), 12-bit depth, high penetration display increases the brightness of dark areas in the image, so that items hidden behind highly absorbent objects are clearly displayed. Low penetration display increases the contrast of low absorption (easy to penetrate) objects, making easy to penetrate objects clearer; therefore, the X-ray security inspection machine is not a decoration, but actually undertakes the work of protecting railway safety.

  

  So how does the security inspection machine detect these dangerous items?

  

  1. Image monitoring method

  

  Image monitoring method directly determines the object from the X-ray image configuration. Therefore, whether the object is suspicious depends on the image on the monitor or display. Unusual objects or objects with different shapes that appear on the display or monitor should be considered suspicious objects. Objects that cannot be accurately identified should also be considered suspicious objects and need to be carefully investigated. The image can be located and analyzed as needed.

  

  2. Color analysis method

  

  The color analysis method is to identify the type of material based on the different colors that different materials show under the x-ray image. The various colors that appear on the monitor are a reflection of the density, quality and quantity of the object. Therefore, the quality of the object can be evaluated based on the depth of the image color.

  

  Light yellow is generally the color of a single piece of clothing, thin plastic, and a small amount of paper.

  

  Orange is generally the color of soap, soap, explosives, drugs, wood, leather products, etc.

  

  Dark orange is generally the color of a large number of books, paper, RMB, high-concentration liquids, large bags of rice and flour, etc.

  

  Blue is the color of inorganic substances such as copper, iron, and zinc. Thick cables, stun guns, bullets, gun barrels, guns, and knives show different shades of blue. Green is the color of mixtures, stainless steel products, cables, etc. show different shades of green. Red is the color of impenetrable objects, mostly heavy metals and thick objects.

The Ultimate Guide to Wholesale Stainless Steel Socket Head Screws

  In the world of fasteners, stainless steel socket head screws stand out for their strength, durability, and resistance to corrosion. Whether you’re in manufacturing, construction, automotive, or electronics, these screws are essential. This guide will explore the benefits, applications, and considerations when purchasing wholesale stainless steel socket head screws.The industry believes that, stainless steel fasteners supplier The development of our company marks the rapid and steady progress of the whole industry. https://shwhardware.com

  

  Benefits of Stainless Steel Socket Head Screws

  

  Corrosion Resistance: Stainless steel is renowned for its ability to resist rust and corrosion, making these screws ideal for environments exposed to moisture and harsh chemicals.

  

  Strength and Durability: These screws offer high tensile strength, ensuring secure and long-lasting connections even in high-stress applications.

  

  Versatility: Stainless steel socket head screws are available in various sizes and grades, making them suitable for a wide range of applications.

  

  Aesthetic Appeal: The sleek appearance of stainless steel is often preferred in applications where the fastener will be visible, such as in furniture or architectural elements.

  

  wholesale stainless steel screws

  

  Common Applications

  

  Manufacturing and Assembly: Used in the assembly of machinery and equipment, these screws ensure components are securely fastened, maintaining the integrity and safety of the products.

  

  Construction: Ideal for structural applications, stainless steel socket head screws provide reliable fastening solutions in buildings and infrastructure projects.

  

  Automotive Industry: These screws are used in various parts of vehicles, from engines to body panels, due to their ability to withstand vibrations and high temperatures.

  

  Electronics: The precision and reliability of stainless steel socket head screws make them perfect for securing electronic components and enclosures.

  

  Marine Applications: Given their corrosion resistance, these screws are extensively used in marine environments for boats, docks, and offshore structures.

  

  Why Buy Wholesale?

  

  Cost Savings: Purchasing screws in bulk reduces the cost per unit, providing significant savings for businesses.

  

  Consistency: Buying wholesale ensures that you receive a consistent supply of screws, maintaining uniformity in your projects.

  

  Convenience: A reliable wholesale supplier can provide a steady stream of inventory, reducing downtime and ensuring that your projects stay on schedule.

  

  wholesale stainless steel screws

  

  Choosing the Right Supplier

  

  Quality Assurance: Ensure the supplier provides high-quality stainless steel screws that meet industry standards and specifications.

  

  Reputation: Look for suppliers with a strong reputation and positive reviews from other customers in your industry.

  

  Customization Options: Some projects may require custom sizes or specifications. Choose a supplier that can accommodate these needs.

  

  Customer Support: Excellent customer service is crucial for addressing any issues or concerns promptly.

  

  Conclusion

  

  Wholesale stainless steel socket head screws are an indispensable component in numerous industries, offering unmatched strength, durability, and corrosion resistance. By understanding their benefits and applications and choosing the right supplier, you can ensure the success and reliability of your projects. Invest in quality stainless steel socket head screws today to experience their long-lasting performance and versatility.

Here are some common information about hexagonal thin nut

  Hexagonal thin nut is a type of hexagonal thin nut commonly used to tighten and connect two or more parts. Its characteristic is its thin thickness, suitable for situations with limited space. Here are some common information about hexagonal thin nuts:With the expanding influence of the industry, stainless steel fasteners supplier Our business is also constantly spreading, and the development of the market is also gradually advancing. https://shwhardware.com

  

  Specifications and dimensions: The specifications and dimensions of hexagonal thin nuts are usually determined based on the thread specifications, such as M3, M4, M5, etc. In addition, there are corresponding standards for the width and height of the opposite side of the nut.

  

  nut-1 (2).pngnut-1 (3).png

  

  Materials: Common materials include carbon steel, stainless steel, copper, etc. Nuts made of different materials have different performance and applicability scenarios.

  

  Grade: The grade of hexagonal thin nuts is usually divided based on their mechanical properties and tolerance requirements. Common levels include 4.8, 8, etc.

  

  Usage: Widely used in the fields of mechanical equipment, automobiles, electronic equipment, etc., for fastening bolts, screws and other connectors to ensure the firmness and stability of the connection.

  

  Standards: The production and use of hexagonal thin nuts usually follow relevant standards, such as national standards (GB), international standards (ISO), etc. These standards specify requirements for the dimensions, tolerances, mechanical properties, etc. of nuts to ensure product quality and interchangeability.

  

  When choosing a hexagonal thin nut, the following factors need to be considered:

  

  Connection requirements: Determine the required nut grade and specification based on the material, size, and force situation of the connecting parts.

  

  Usage environment: Consider factors such as temperature, humidity, and corrosiveness in the usage environment, and choose suitable materials and surface treatment methods.

  

  Installation space: Select a hexagonal thin nut with appropriate thickness based on the size of the installation space.

  

  Standard requirements: If there are specific standard requirements, nuts that meet those standards should be selected..

How to Choose the Perfect Memory Foam Travel Pillow for Your Next Trip

  Traveling can be exhilarating, but long journeys often come with discomfort, especially when it comes to sleep. A quality memory foam travel pillow can make all the difference, providing support and comfort during flights, road trips, or even train rides. However, choosing the right one involves considering several factors to ensure it meets your specific needs. Here¨s a guide to help you choose the perfect memory foam travel pillow for your next trip.The data shows that, travel pillow memory foam Its development potential should not be underestimated, and it is also the inevitability of its existence. https://tainengjikang.com/

  

  How to Choose the Perfect Memory Foam Travel Pillow for Your Next Trip

  

  JK796

  

  1. Consider Your Sleeping Style

  

  The first step in choosing a memory foam travel pillow is to consider your sleeping style. Do you usually sleep with your head tilted to one side? Do you prefer sleeping upright or leaning forward? Understanding your typical sleeping position will help you choose a pillow that provides adequate support and aligns your neck and spine properly.

  

  2. Neck Support and Comfort

  

  One of the primary benefits of a memory foam travel pillow is its ability to contour to the shape of your neck and head, providing personalized support. Look for a pillow with medium to firm density memory foam, as this will offer the best balance of comfort and support. The pillow should maintain its shape and provide consistent support throughout your journey.

  

  3. Size and Portability

  

  The size and portability of the travel pillow are crucial factors, especially if you have limited space in your carry-on luggage or backpack. Opt for a pillow that is compact and lightweight yet offers sufficient support. Many memory foam travel pillows come with compression bags or travel cases that make them easier to carry and store when not in use.

  

  4. Material and Breathability

  

  Check the material used in the pillow cover and the breathability of the memory foam itself. A breathable cover helps regulate temperature and keeps you cool during warm journeys. Some pillows feature moisture-wicking properties to prevent sweat buildup, enhancing comfort, especially on long flights or in humid conditions.

  

  5. Adjustability and Versatility

  

  Consider whether you prefer a traditional U-shaped pillow or a more versatile design that can be adjusted to different sleeping positions. Some memory foam travel pillows offer adjustable straps or toggles that allow you to customize the fit around your neck. This adjustability ensures maximum comfort and support, regardless of how you prefer to sleep.

  

  6. Ease of Maintenance

  

  Travel pillows can accumulate dirt and odor over time, so choose one that is easy to clean. Look for pillows with removable and washable covers, or those that can be spot-cleaned with ease. This feature not only helps maintain hygiene but also prolongs the lifespan of your travel pillow.

  

  7. Durability and Longevity

  

  Invest in a travel pillow that is durable and built to last. Quality memory foam retains its shape and resilience over time, ensuring that your pillow continues to provide optimal support through multiple trips. Check customer reviews and product specifications to gauge the durability of the pillow before making a purchase.

  

  8. Reviews and Recommendations

  

  Before finalizing your decision, read reviews and recommendations from other travelers who have used the pillow. Honest feedback can provide valuable insights into the pillow¨s comfort, support, and overall performance during real-world use. Look for pillows with high ratings and positive reviews to ensure satisfaction.

  

  9. Budget Considerations

  

  While quality should be your priority, consider your budget when choosing a memory foam travel pillow. There are options available across different price ranges, so you can find a pillow that meets your needs without breaking the bank. Compare features and prices to make an informed decision that aligns with your budget.

  

  10. Trial Period and Return Policy

  

  If possible, choose a memory foam travel pillow that comes with a trial period or a generous return policy. This allows you to test the pillow and determine if it suits your comfort preferences before committing to it for your travels. A satisfaction guarantee ensures peace of mind and helps you make a confident purchase decision.

Hot melt nuts are fasteners that embed nuts into plastic or other materials through a hot melt process.

  It is usually made of copper and has the following characteristics:Besides, we can’t ignore. stainless steel fasteners supplier It has injected new vitality into the development of the industry and has far-reaching significance for activating the market. https://shwhardware.com

  

  Easy installation: By heating the nut to blend with the base material, the installation process is simple and fast.

  

  Strong connection: After hot melting, it can form a strong connection with the base material, with high pulling force and torque.

  

  No need for tapping: The nut already has threads inside, so there is no need to tap on the base material, saving processing time and cost.

  

  Beautiful and neat: The nut is flush with the surface of the base material, and the appearance is beautiful and neat.

  

  When selecting a hot melt nut, factors such as the size, material, and thread specifications of the nut need to be considered to ensure its compatibility with the base material and connection strength. At the same time, attention should also be paid to the parameters of the hot melt process, such as heating temperature, heating time, and pressure, to ensure the installation quality of the nut.