Sanwei:Your Professional Bolt Shape Manufacturer!
Hebei Sanwei Fasteners Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sale of fasteners, located in Hebei Province, China. Since its establishment,wei has been committed to providing customers with high-quality, high-performance fastener solutions, which are widely used in various fields such as construction, machinery manufacturing, automobile, and power communication.
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![Carriage Bolts DIN 603]()
Carriage Bolts DIN 603Standard: DIN 603. Name: Carriage Bolts. Material:carbon steel,Stainless Steel and alloy steel,etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8,SS201,SS304,SS316 -
![Single Head Bolts]()
Single Head BoltsName: Single head bolts. Material: carbon steel, alloy steel. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9. Nominal Diameter: M2-M48 -
![Square Head Bolts]()
Square Head BoltsStandard: ASME B 18.2.1. Name: Square head bolts. Material: carbon steel, alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 -
![U-Bolts]()
U-BoltsStandard: DIN3570. Name: U-bolt. Material: carbon steel, alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 -
![T-bolts]()
T-boltsStandard: DIN261. Name: T-bolt. Material: carbon steel, alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 -
![Cross Bolts]()
Cross BoltsStandard: DIN968. Name: Cross bolt. Material: carbon steel, alloy steel. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 -
![Eye Bolts]()
Eye BoltsStandard: DIN580. Name: Eye bolt. Material: carbon steel, alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9
Why Choose Us
OEM/ODM Service
Our customised fasteners are made to your special requirements. It can be fully threaded or partially threaded, and the thread, driving method, material, length, head shape, plating and all these can be specially designed according to your needs.
Good CNC machining technology
From material selection to finished products, Handan Sanwei provides you with comprehensive solutions when it comes to customised fasteners. The fasteners we make are high precision and strong. No matter what kind of precision you need, we can meet it and guarantee your satisfaction.
Strong engineering design team
Our company has an excellent and professional engineering team, and a number of technicians are elites in the industry. The staff always strives to explore new methods and technologies. From the selection of metals and special alloy materials to the finished fasteners, we can solve all aspects of the whole project engineering.
Professional Testing Laboratory
Quality assurance and testing is an important part of producing fasteners. Handan Sanwei has a specialised quality testing laboratory with spectrometers, hardness testers, tensile testers, salt spray test chambers and other equipment, where raw materials and final products are strictly tested. In addition, the company also has experienced testing experts who use professional methods to comprehensively test the fasteners and finally give you a detailed test report.
Digital Quality Control System
We rely on our self-developed full-process digital quality inspection system to strictly control every step from raw materials entering the factory to finished products being shipped. This system will always monitor the quality of the products to ensure that each batch of products meets the industry standards and complies with customer requirements. In addition, it collects and feeds back data in real time, giving you a clear understanding of product quality.
Types of Bolt Shape
The bolt shape produced by our company mainly include the following types:
Square Head Bolts
A square head bolt is a fastener with a square head that is typically used in application scenarios that require high torque resistance and stability. It is designed to allow tightening and loosening operations using tools such as wrenches or pipe wrenches, and is particularly suited to applications where space is limited or high torque is required.
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Standard |
ASME B 18.2.1 |
|
Name |
Square head bolts |
|
Material |
Carbon steel, alloy steel, etc. |
|
Grade |
Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 |
|
Nominal diameter |
1/4-1-1/2 |
|
Pitch |
0.4-5 |
|
Finish |
ZP,YZ,BLACK |
|
Alias |
Square head screws, square head fastening bolts |
U-Bolts
The U-bolt is a unique and very useful fastener. Its body is U-shaped, with threads on both ends, this structural design allows it to ring and fix all kinds of round or columnar objects.
|
Standard |
DIN3570 |
|
Name |
U-bolt |
|
Material |
Carbon steel, alloy steel, etc. |
|
Grade |
Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 |
|
Nominal Diameter |
M2-M48 |
|
Pitch |
0.4-5 |
|
Surface treatment |
ZP,YZ,BLACK |
|
Alias |
U-type clamps, U-type pipe clamps |
Enhanced Torque Transmission: The square head design allows for greater torque transmission, making it easier to tighten or loosen bolts, especially in high-torque applications.
Improved Grip: The larger contact area provided by the square head ensures a secure grip, reducing the risk of slippage during fastening.
Resistance to Shear Forces: Square head bolts exhibit excellent resistance to shear forces, making them suitable for heavy-duty applications where structural integrity is essential.
Aesthetic Appeal: In addition to their functional benefits, square head bolts offer aesthetic appeal, particularly in architectural and decorative applications where visual appearance matters.
Easy Identification: The distinctive square head makes square head bolts easy to identify, simplifying inventory management and installation processes.
Structural Strength
U-Bolts are known for their ability to provide excellent structural strength. With their sturdy design and high-quality materials, U-Bolts can withstand considerable loads without deforming. This makes them ideal for applications requiring strong fastening, such as in pipe installations and steel constructions.
Installation Flexibility
One of the key advantages of U-Bolt is its installation flexibility. It can be used for various sizes and types of pipes or poles, making it a very versatile choice. The installation process is also relatively easy and quick, minimizing operational time and costs.
Corrosion Resistance
U-Bolts are also known for their good corrosion resistance, especially when made from materials like stainless steel or galvanized steel. This corrosion resistance makes U-Bolts ideal for use in damp or open environments, where weather conditions and surroundings can affect the quality of other bolts. As a result, U-Bolts tend to last longer, reducing the need for maintenance or regular replacements.
Strength and Rigidity
U-Bolts offer an excellent combination of strength and rigidity. With precisely installed threads, U-Bolts provide a very stable fastening, preventing unwanted shifting or position changes. This strength and rigidity are particularly needed in applications involving high vibration or pressure.
Versatility
Available in a variety of sizes, shapes and materials, U-Bolts can be customized to meet specific needs and are suitable for a variety of industries and applications. This versatility makes them versatile, providing practical solutions for a variety of fastening needs.
Application of Square Head Bolts
Timber Construction
Square head bolts are frequently employed in timber construction, where they help securely connect large beams, posts, and trusses. Their robust hold ensures the structural integrity of the wooden framework in buildings, bridges, and other timber-based structures.
Heavy Machinery and Equipment
In the realm of heavy machinery and equipment, square head bolts play a critical role in joining various components. Whether it’s construction equipment, industrial machinery, or agricultural implements, these bolts provide a strong and dependable connection to withstand heavy loads and vibrations.
Railroad and Automotive Industry
Square head bolts find widespread use in the railroad and automotive industry. In the railroad sector, they are essential for fastening tracks, plates, and rail components securely. In the automotive world, they are employed in engine assembly, chassis construction, and other critical connections.
Marine Applications
Given their corrosion-resistant properties, square head bolts made of stainless steel, brass, or bronze are extensively used in marine applications. They ensure the longevity and reliability of structures, fittings, and equipment exposed to saltwater and harsh marine environments.
Historic Restoration
In restoration projects or constructions aiming for a traditional or historical aesthetic, square head bolts offer an authentic look. These bolts help maintain the charm of historical buildings, preserving their legacy for future generations.
Utility Poles and Bridges
Square head bolts are commonly employed in securing utility poles and connecting bridge components. Their sturdiness and ability to withstand external forces make them a preferred choice in these vital infrastructures.
Agriculture and Farming
The agricultural industry relies on square head bolts for assembling and maintaining various farming machinery and equipment. From tractors to harvesters, these bolts ensure the safe and efficient operation of agricultural tools.
Pipe Flanges and Plumbing
Square head bolts are utilized in pipe flanges and plumbing fixtures, providing secure connections that prevent leaks and maintain fluid flow in various industrial and residential plumbing systems.
Construction: U-bolts are widely used in the construction industry to secure beams, pipes, and cables to various structures. They provide stability and prevent movement, ensuring the structural integrity of buildings and bridges.
Automotive: In the automotive industry, U-bolts secure leaf springs to axles and suspensions. They provide support and help maintain proper alignment, ensuring a smooth and safe ride.
Marine: U-bolts are corrosion-resistant, making them ideal for marine applications. They are used to secure items such as ship trailers, deck fittings, and rigging equipment, and are able to withstand the harsh conditions of marine environments.
Electrical and Telecommunications: U-bolts are commonly used to secure cables and wires to utility poles, ensuring the safety and order of electrical and telecommunications infrastructure.
Agriculture: U-bolts are widely used in the agricultural sector for equipment and machinery such as stationary, tillers, and trailers. They provide stability and prevent movement during operation.
Plumbing and HVAC systems: U-bolts are used in plumbing and HVAC systems to secure pipes, ducts, and equipment. They ensure secure connections, prevent leaks, and improve system efficiency.
Industrial machinery: U-bolts are used in a variety of industrial machinery applications, such as securing conveyor systems, installing equipment, and supporting heavy objects.
Follow these five steps to ensure your U-bolt is installed correctly.
Step 1: Remove the Nuts
The U-bolt will probably come with nuts attached to its threads. Start by taking the nuts off each side of the bolt.
Step 2: Position the U-Bolt
Place the U-bolt around the object you’re attaching to the beam or support. This object is usually piping or tubing.
Step 3: Examine Your Holes
Next, make sure you properly drill holes through the support structure. If you’ve drilled through the beam, make sure you haven’t damaged its protective coating. Cracks in the coating can lead to rusting around holes. At this stage, it’s smart to touch up the beam’s surface around holes before adding your bolts.
Step 4: Thread the Bolt Through
Push the two bolt ends through the holes and thread the nuts on each end of the U-bolt.
Step 5: Fasten the Nuts
It’s good to note that nut placement on a restraint will be different from a guide. If you’re working with a restraint, you’ll want to tighten the nuts on the bottom side of the beam.
Installation of Square Head Bolts
Preparation
Proper preparation is crucial for securely installing square head bolts. Start by cleaning the surface where the bolt will be installed, removing any debris, dirt, or contaminants, and aligning the holes in the materials to avoid cross-threading or misalignment.
Insertion
Once the surfaces are prepared, proceed with inserting the square head bolt. Place the bolt through the aligned holes of the materials being fastened. Square head bolts usually have threads for a nut, which should be used to secure the bolt.
Tightening
Use standard tools like pliers or wrenches to tighten square head bolts efficiently. Ensure the bolt is secure but avoid overtightening, as this can damage the surrounding material or strip the threads.
Final Check
After tightening, check that the bolt is properly seated and secure, looking for any misalignment or movement that could weaken the fastening.
Packaging and Shipping
FAQ
We're professional bolt shape manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale customized bolt shape made in China here from our factory. Contact us for quotation.
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