Bolts, nuts, and other fasteners are the unsung heroes in the world of engineering. These small yet powerful components keep everything secure, from cars to buildings. Bolts, often paired with nuts, provide a strong, stable, and removable joint. Other related products, like screws, washers, and anchors, further expand the possibilities, making sure everything holds together in perfect harmony.

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General Applications For Bolts and Nuts

  • In construction, bolts and nuts are vital. They are used to create joints that can bear loads and resist tension, providing the stability that structures require. For instance, they’re crucial in steel framing, where they secure beams and columns together. From skyscrapers to bridges, bolts and nuts underpin the integrity and safety of our built environment.
  • In the field of electricity, bolts and nuts are crucial for securing electrical equipment, mounting circuit breakers, or connecting transmission lines. They ensure proper grounding, reduce the risk of electrical faults, and maintain the stability of power systems. From power plants to home installations, these fasteners light up our world with safety and efficiency.

General Hot Selling Products

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Hex bolts

Bolt grade refers to the strength of a bolt, measured by factors such as tensile strength and yield strength. Common grades include 2, 5, and 8, with grade 8 being the strongest.The bolt is divided into full thread and half thread according to the thread angle. . Surface treatments, like Hot dip galvanizing or electrical galvanzizing, enhance corrosion resistance, improving durability and lifespan. With the right grade, type, and treatment, bolts can tackle any task.

Hex bolt Size and Thread pitch chart

U bolt

The U  bolt, often referred to as a U bolt , is a fastener featuring a U shape with two threaded arms extending from a curved base. Predominantly used to support pipework in construction, these bolts clamp around the outside diameter of the pipe. They’re incredibly versatile, also securing heavy objects to structures or aiding in vehicle suspension. U-bolts offer sturdy support, with the added benefit of adjustability. There are two types of U-bolts, one is U-bolt and the other is square U-bolt.

U bolt size chart

Stud bolt

Stud bolt is a key component in many applications. It’s a type of fastener that has threads on both ends, with an unthreaded shaft in the middle. It’s designed to be inserted into pre-drilled holes of two adjoining parts, with nuts then threaded onto each end to secure the assembly. These bolts are particularly useful in applications where one side is inaccessible for installation or adjustment. They offer robustness and versatility, making them a staple in many industries.The most common standards for stud bolts are DIN 975 and DIN 976.

Square Bolt

square head bolts are quite unique. They feature a four-sided, square-shaped head, which provides a large bearing area for positive gripping with an open or adjustable wrench. This makes them easier to tighten in hard-to-reach places compared to their hexagonal counterparts. Traditionally, they’ve been used in industrial and heavy-duty applications due to their robust design and greater wrenching area. The square head also prevents the bolt from turning once it’s installed, providing a distinct advantage in certain applications.

V Cross Arm

Anchor bolts, known as foundation bolt, are an indispensable part of construction and building projects. They’re specifically designed to secure structures to concrete, creating a strong and reliable link between the structure and its foundation.

One end of the anchor bolt is embedded in the concrete, while the opposite end is exposed and threaded. This exposed end allows for the easy attachment of a nut or a washer, effectively securing whatever needs to be fastened. Anchor bolts are typically made of sturdy materials, such as stainless steel or carbon steel, to ensure long-lasting strength and resistance against environmental stressors.

There are several types of anchor bolts, each with its specific applications and characteristics. J-bolts are shaped like the letter “J” and are often used when it’s necessary to hook onto the object being secured. Wedge bolts, on the other hand, expand as a load is applied, creating a firm grip inside the drilled hole in the concrete. L-bolts, named for their “L” shape, are typically cast in place and used for lighter loads.

These anchor bolts are used in a variety of applications. From securing the sill plates of buildings to the foundation, holding down machinery in an industrial setting, to fastening highway signs and traffic signal equipment in place. They’re essential in the construction of skyscrapers, bridges, dams, and other structures where stability and security are paramount.

Despite their often-unseen role, anchor bolts play an important part in our daily lives. They keep our buildings secure, our machinery steady, and our public infrastructure stable. Without them, the world as we know it, quite literally, wouldn’t hold together.

Anchor bolts are a shining example of how something small can make a huge difference. They prove that in engineering, every detail matters and can contribute significantly to the overall safety, function, and success of a project.

Hex Nut

The hex nut is one of the most common types of fasteners used in various applications. As its name suggests, it has a hexagonal shape that provides six points of contact for a wrench, offering a good balance of torque and accessibility. Made from a variety of materials such as steel, stainless steel, brass, and nylon, hex nuts are used in conjunction with a mating bolt to fasten multiple parts together. Depending on the specific needs of an application, there are many varieties including lock nuts, jam nuts, and flange nuts. Each type offers its own unique advantages, from resistance to loosening, to providing a larger surface area to prevent damage to the part being secured.

Flat Steel Crossarm brace

The flat washer, is a simple yet essential fastener. It’s a thin, flat disc with a hole in the center. The primary function of a flat washer is to distribute the load of a threaded fastener, such as a bolt or a screw.

By increasing the surface area, it prevents damage to the surface being fastened and reduces stress on the material. Moreover, it helps to ensure a smoother, more even distribution of pressure during the tightening process.

Flat washers can also be used to provide a smooth surface for the nut or bolt to tighten against, reducing friction and preventing loosening over time. They can provide a certain level of corrosion and heat resistance, and act as a spacer or shim.

Flat washers come in different sizes and materials, including steel, stainless steel, brass, and nylon, allowing for wide application across various industries. From automotive to electrical, construction to home appliances, flat washers play an indispensable role in ensuring tight, secure, and damage-free connections.

Flat brace Size(mm) Length(inch) Weight(kg)
30*3 18'' 0.3
38*4 22'' 0.6
40*4 24'' 0.78

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Estimated Cost Analysis For Bolts and Nuts

The Process Flow & Duration Estimation

Please note that the final cost depends on the customized service you require, the specifications of the raw materials used, the relevant national laws, and the distance of transportation. Take the example of booking a tall container of products:

Step 1:Drawing confirmation (1-2days)

Dapeng’s engineers will CAD drawings, according to the customer’s description of the drawings and get the customer’s confirmation to start the following links

Step 2: Sampling (2-4days)

the criticality of sample confirmation before mass production. It’s essential for ensuring product quality and functionality. We offer free samples, allowing clients to evaluate and provide feedback, thereby guaranteeing high-standard products and customer satisfaction.

Step 4: Bulk Manufacturing (5-10days)

The mass production of bolts starts with designing, followed by material selection, usually high-quality steel.Then the cold pier is formed. After that, each bolt and nut is galvanized for corrosion resistance. A thorough quality inspection ensures only top-notch products are distributed.

Step 5: Shipping (10-15 days)

Bolt and Nut  packing: 50-100 pcs put on top of the wooden pallet, wrapped with winding film and finally packed with packing tape.

Want to know how to compress lead times?

To shorten delivery times, optimize production processes, streamline supply chains, maintain adequate inventory, and use expedited shipping services

The Common Pitfalls When Purchasing

  • Incorrect size:

    For instance, a buyer may order bolts built with materials that are 16 mm . However, upon receipt of the product, they may find that the actual diameter of the materials used is only 14.5mm. This discrepancy, albeit seemingly minor, can have significant implications on the performance and durability of the bolts.

    inadequate bolt diameters can result in improper clamping forces during assembly. Bolts are designed to exert a specific amount of force to hold components together securely. When the bolts are undersized, they may not generate enough clamping force, causing the joints to loosen over time. This can lead to excessive vibrations, noise, and potential malfunctioning of the system or equipment.

    Moreover, undersized bolts may suffer from reduced fatigue resistance. In dynamic applications or structures subjected to cyclic loading, such as wind turbines or moving machinery, smaller bolts might be more prone to fatigue failure due to their diminished capacity to withstand repeated stress. This can lead to unexpected and premature bolt failure, posing severe safety risks and costly downtime for repairs or replacements.

    In addition to structural and mechanical concerns, using bolts with smaller diameters than specified can also lead to issues during inspections and compliance with industry standards and regulations. Construction projects must adhere to specific codes and guidelines to ensure safety and quality. Non-compliance with these regulations may result in project delays, legal liabilities, and reputational damage to both the manufacturer and the construction company.

    Another potential risk is material incompatibility. If the undersized bolts are made from materials different from the ones originally specified, there may be a mismatch in their mechanical properties, including strength and corrosion resistance. This can result in galvanic corrosion and compromise the bolts’ performance, leading to premature failure and reduced lifespan.

    Furthermore, the overall reliability and longevity of the construction project are compromised when using undersized bolts. The need for frequent maintenance and repairs due to bolt failures can significantly increase project costs, disrupt operations, and cause delays, leading to dissatisfied customers and stakeholders.

    In conclusion, utilizing bolts with a diameter smaller than what the customer requires can lead to a cascade of potential risks during later stages of construction. These include compromised structural integrity, insufficient clamping force, reduced fatigue resistance, non-compliance with regulations, material incompatibility, and increased maintenance and repair costs. As responsible engineers and manufacturers, it is crucial to adhere to the specified requirements and ensure that only properly sized bolts are used to guarantee the safety and success of construction projects.

  • Insufficient zinc coating on bolts can lead to corrosion, reducing lifespan, weakened joints, environmental impact, and increased maintenance costs. Proper galvanization methods and regular inspections are essential for longevity and reliability.
  • The fourth trap is insufficiently robust packaging from suppliers. This can lead to deformation of goods during transit, causing difficulties in unloading at the destination port. It could result in product damage, increased wastage, potential delays in project timelines, and extra costs related to replacements, thus affecting overall project efficiency and reliability.

A Brief Self-Nomination​, Why Choosese Dapeng power?

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  • In today’s interconnected world, where traditional business methods are giving way to online transactions, the availability of fasteners and power line fittings manufacturers is just a few clicks away. But what sets us apart in this crowded digital market? Our understanding goes beyond merely providing fasteners and power line fittings. We aim to be a reliable, proficient, experienced, and approachable Chinese partner, dedicated to fueling your business growth and navigating new markets. Our commitment to excellent customer service remains unmatched. Trust us with your requirements, and we pledge to exceed your expectations, guarantee your satisfaction, and earn positive reviews. Let’s forge a successful partnership and strive together towards a robust and reliable power infrastructure.
  • Complete production equipment to meet the production needs of different products.
    Excellent team of engineers
    15 years of experience in the power line hardware industry
    Exporting to multiple countries is very clear about the special requirements for each country’s products.
  • Each product must complete two steps of testing before leaving the factory, the first tensile strength test, the second zinc layer thickness test, to ensure that each product is 100% qualified.

The Basic Knowledge About Bolts and Nuts

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A stay rod is designed in two primary forms: bow stay rod and tubular stay rod. Each type has its unique components and applications, ensuring that electrical poles and overhead lines remain stable and securely anchored to the ground.

The FAQs About Bolts and Nuts

Bolts come in various grades, each denoting its material properties and strength. The most common grades include Grade 2, a standard low-carbon steel bolt for general use with lower tensile strength; Grade 5, medium carbon steel with higher tensile strength, often used in automotive applications; Grade 8, high-strength alloy steel bolt, ideal for demanding structural and machinery purposes. Additionally, there are stainless steel grades like A2 and A4 known for their corrosion resistance. The grade of a bolt is crucial in determining its suitability for specific applications, ensuring safety and reliability in various industries.

Measuring bolt sizes can seem complex, but it's actually a straightforward process. Here's a step-by-step guide:

  1. Diameter: Use a vernier caliper to measure the outer diameter of the bolt's thread. This measurement is known as the 'nominal diameter'. In the case of metric bolts, this value will be given in millimeters (mm).

  2. Length: The length of a bolt is measured from the underside of the bolt head to the end of the thread. Remember, this doesn't include the head itself. Use your caliper again to get an accurate measurement.

  3. Thread Pitch: This is the distance from one thread to the next, measured in mm for metric bolts. A pitch gauge can help you measure this accurately.

  4. Grade: The grade of a bolt refers to its strength and is often marked on the head of the bolt itself. For example, an '8.8' mark on a metric bolt indicates a tensile strength of 800 MegaPascals and a yield strength of 80% of the tensile strength.

  5. Head Type: Lastly, note the type of the bolt head. Common types include hex, square, and round.

Armed with this information, you'll be able to correctly identify and order the bolts you need. If in doubt, consult with a professional to avoid any mishaps.

Keep in mind that it's essential to use the correct bolt size for your specific application to ensure safety and structural integrity. Remember, precision matters in every detail!

Bolt heads come in various types, each suited for a specific use. Hex head bolts, the most common, offer a balance of torque and accessibility. Square heads provide a large bearing area, ideal for high-torque applications. Carriage bolts are used in wood applications due to their firm hold. Flange bolts have a built-in washer, distributing load and saving time. T-bolts are great for a smooth finish, while eye bolts enable lifting or moving objects. U-bolts support pipework, and Allen or socket head bolts allow for high torque without damaging the bolt head.

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