China Customized Function Bolts Manufacturers Suppliers Factory - Wholesale Service

Sanwei:Your Professional Function Bolts 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.

Carriage Bolt
GB/T14 DIN603 GB/T12-85. Coarse thread. Diameters range from M6 to M30. Length from 10mm to more than 200mm.
Carriage Bolts
Standard: DIN603. Name: Carriage bolts. Material: carbon steel, alloy steel, etc.. Grade: 4.8 grade, 5.8 grade, 8.8 grade, etc.
Ground Anchor Bolts
Standard: DIN529. Name: Ground Bolt. Material: carbon steel. Grade: Grade 4.8, Grade 5.8, Grade 8.8
Elevator Expansion Bolts
Name: Elevator Expansion Bolts. Material: carbon steel. Grade: 4.8 grade, 5.8 grade, 8.8 grade. Nominal Diameter: M2-M30

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 Function Bolts

The function bolts produced by our company mainly include the following types:

Carriage Bolts
The carriage bolt, also known as a round head square neck bolt, is a fastener designed for use in fastening situations where aesthetics and security are required. It is unique in that the lower part of the head has a square neck section. When it is screwed into wood or the nuts and parts that go with it, this square section is embedded in the material, preventing the bolt from rotating, thus ensuring a secure and stable connection.

Standard	DIN603
Name	Carriage bolts
Material	Carbon steel, alloy steel, etc.
Grade	4.8 grade, 5.8 grade, 8.8 grade, etc.
Nominal Diameter	M2-M48
Pitch	0.4-5
Surface treatment	ZP,YZ,BLACK
Alias	Round head square neck bolts

Ground Anchor Bolts
A ground anchor bolt is a pre-embedded part that is specifically embedded in a concrete foundation to secure the base of various machines and equipment against wind, seismic forces, and other possible external influences. It usually consists of a long screw, one end of which is pre-embedded in the concrete, while the other end is exposed to the ground for the installation of machinery and equipment or the bottom frame of a building. Depending on the specific needs, a ground anchor bolt can come in different shapes and sizes, including straight, L-type, J-type, etc., and each type has its specific application scenarios.

Standard	DIN529
Name	Ground Bolt
Material	Carbon steel
Grade	Grade 4.8, Grade 5.8, Grade 8.8
Nominal Diameter	M8-M48
Pitch	1-5
Surface treatment	ZP,BLACK
Alias	Ground Anchor Bolt

Advantages of Carriage Bolts

Enhanced Security

One of the primary advantages of carriage bolts is their tamper-resistant design. Unlike traditional bolts that can be loosened from either end, the round head of a carriage bolt lacks a gripping surface for tools.This prevents unauthorized removal from the exposed side, making them an ideal choice for securing fences, outdoor furniture, and public infrastructure components.

Aesthetic Appeal

Carriage bolts offer a sleek and professional appearance, making them preferable for applications where visible fasteners are an integral part of the design. The smooth, dome-shaped head eliminates protrusions that could detract from the overall aesthetic of a project.

Corrosion Resistance

Durability is a crucial factor in fastener selection, and carriage bolts excel in this regard. The availability of corrosion-resistant coatings such as galvanized zinc, black oxide, and stainless steel ensures prolonged service life even in harsh environmental conditions. These protective treatments prevent rust formation, reduce material degradation, and maintain structural integrity over time, making them ideal for outdoor and industrial applications.

Ease of Installation

Another distinct benefit of carriage bolts is their ease of installation, which is a valuable property compared to many other types of threading elements. The rounded head can be conveniently manipulated using one hand, while the presence of the square neck ensures that the bolt is not rotated when the nut placed on the other end is tightened. As a result, no special skills or tools are necessary to install such bolts properly, making them suitable even for inexperienced people who are following a DIY plan.

Advantages of Ground Anchor Bolts

Stability and Safety: Ground anchor bolts provide stability and safety to structures and equipment that are exposed to high winds, seismic activity, or other environmental factors that may cause them to shift or tip over.

Cost-Effective

Ground anchor bolts are a cost-effective solution for foundation support, as they require less excavation and concrete than traditional foundations.

Quick Installation

Ground anchor bolts can be installed quickly and efficiently, reducing the time and labor required for construction.

Versatility

Ground anchor bolts can be used for a wide range of applications, including securing structures, stabilizing slopes, and retaining walls.

Minimal Environmental Impact

Ground anchor bolts have a minimal environmental impact and can be used in environmentally sensitive areas where traditional foundation systems are not practical.

Durability

Ground anchor bolts are highly durable and can withstand the test of time, ensuring long-term stability for structures and equipment.

Customization

Ground anchor bolts can be customized to fit specific project requirements, including anchor type, size, and load capacity.

Application of Carriage Bolts

Woodworking and Construction
Carriage bolts are widely utilized in woodworking and building applications. They are used to link timber components such as beams, posts, and boards, ensuring a strong and long-lasting bond. Carriage bolts are extensively employed in the construction of decks, fences, and other structural woodwork.

Furniture Assembly
Because of their clean appearance and secure fastening, carriage bolts are a popular choice for furniture assembly. They are used to link furniture items such as tables, chairs, and cabinets, giving the end product stability and strength.

Playground Equipment
Carriage bolts are widely used in the construction of playground equipment, swing sets, and jungle gyms. Their smooth, rounded heads reduce the risk of damage to children while they playing, while the square neck prevents the bolts from loosening over time.

Automotive Applications
Carriage bolts are used in the automobile industry to fasten non-critical pieces of vehicles such as fenders, bumpers, and interior components. Because of their ease of installation and secure latching, they are ideal for assembly lines and repair operations.

Signage and Display Boards
Signage, display boards, and placards are routinely attached to various surfaces using carriage bolts. Their robust fastening guarantees that signage stays in position even in high-wind or outdoor situations.

Agricultural Equipment
A carriage bolt is used in the agricultural industry to build and repair farming equipment such as gates, barn doors, and animal enclosures. They are suited for outdoor applications due to their resilience to weather and corrosion.

Roofing and Truss Construction
Carriage bolts are used in roofing and truss construction to securely hold beams and rafters together. Their durability and resistance to pulling out make them reliable for structural elements.

Marine Applications
Carriage bolts are frequently utilized in marine applications such as boat construction and dock construction. Because of their corrosion resistance, they are suited for use in damp and maritime situations.

Outdoor Structures
Carriage bolts are commonly employed in the construction of outdoor buildings such as pergolas, gazebos, and pavilions. They ensure the structural integrity of the outdoor spaces by providing a secure link between wooden and metal components.

Repair and Maintenance
Carriage bolts are frequently used in repair and maintenance jobs that require secure fastening. They are used in a variety of applications to replace damaged or worn-out fasteners.

Application of Ground Anchor Bolts

Civil engineering: Ground anchor bolts are commonly used in civil engineering projects such as retaining walls, bridge abutments, and soil nailing to provide stability and prevent soil erosion.

Construction: Ground anchor bolts are used in construction to secure temporary structures like scaffolding and formwork, as well as permanent structures such as building foundations and transmission towers.

Horticulture: Ground anchor bolts can be used to secure trees, planters, and trellises in gardens and greenhouses.

Marine and offshore: Ground anchor bolts are used in marine and offshore applications to secure buoys, mooring systems, and floating structures.

Mining: Ground anchor bolts can be used in mining operations to secure excavation areas and stabilize mine shafts.

Infrastructure: Ground anchor bolts can be used to secure various infrastructure elements such as tunnels, pipelines, and underground storage tanks.

Energy: Ground anchor bolts are used in the renewable energy sector to secure wind turbines and solar panel installations.

Packaging and Shipping

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FAQ

Q: I need a customized fastener, but it's not on your website. What do I do?

A: Please send us your request with detailed drawings or photos, then we will make the quotation for you accordingly.

Q: In general, how long can delivery be made after receiving an order?

A: Regular orders can be completed and shipped within 15-20 working days after receiving the deposit and confirming product details.

Q: During the product usage process, if we encounter technical problems, can you provide technical support?

A: Sure. We have a professional technical team that can provide you with technical consultation and guidance through methods such as telephone, email, or video conference.

Q: What is the packaging method of the product?

A: 50KG bag and pallet.

Q: What is your minimum order quantity?

A: Our minimum order quantity (MOQ) varies depending on the bolt type. For standard hex bolts, the MOQ is typically 1,000 pieces per size. This helps us streamline production and cover associated costs. For specialty bolts like custom - designed anchor bolts, the MOQ is around 5,000 pieces due to the complexity of manufacturing. However, we're flexible. If you're ordering a diverse range of bolts, we can negotiate a lower MOQ for each item. For new customers looking to build a long - term relationship, we'll consider reducing the MOQ on a case - by - case basis. For common aluminum bolts, we may set the MOQ as low as 800 pieces to accommodate smaller - scale projects.

Q: Do carriage bolts have shear strength?

A: Yes. All carriage bolts have certain amount of both tensile and shear strength, depending on the grade and material of the fastener. Stainless steel carriage bolts usually have a shear strength of around 90,000psi.

Q: What is the difference between a lag bolt and a carriage bolt?

A: A carriage bolt has a flat end, while a lag bolt has a pointed tip. The top of a carriage bolt has a square neck that resists turning once the bolt is fastened. The flat end means that a washer and nut are used to secure a carriage bolt. Lag bolts have wide threads and are most often used with wood. They can be screwed directly into the wood and do not require nuts to complete the assembly.

Q: How do you measure a carriage bolt?

A: It is important to remember that carriage bolts are measured along their entire length, right from underneath the head, including the square neck. Don’t make the mistake of measuring from under the neck – this is a common error.

Q: How do you install ground anchor bolts?

A: Select a suitable area.
Place the Anchor in situ - as this will be your template for drilling.
Drill pilot holes with a 12mm masonry drill to a depth of roughly 10mm.
Remove the unit ready to redrill.
Redrill using a 16mm masonry drill to a depth of 75mm.

Q: How long do ground anchors last?

A: Ground anchors can last for a very long time, potentially decades or even longer, depending on the type, quality, and environmental conditions. Permanent ground anchors are designed to last for the lifespan of a structure, which can be 100 years or more. Temporary anchors, used during construction, are typically designed for a shorter period, usually less than two years.

We're professional function bolts manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale customized function bolts made in China here from our factory. Contact us for quotation.

function bolts, Ground Anchor Bolts, Carriage Bolts