China Thread Manufacturers Suppliers Factory - Customized Thread Made in China

Sanwei:Your Professional Thread 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.

Galvanized Threaded Rods
Standard: DIN975. Name: Galvanized Threaded Rods. Material: Carbon steel and alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8
Double - Ended Stud
Standard: DIN938. Name: Double-ended studs. Material: carbon steel and alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9
Stainless Steel Threaded Rod
Standard: DIN975. Name: Stainless steel teeth. Material: 304, 316 stainless steel. Grade: A2-70, A4-70

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.

Advantages of Thread

Frictional Force

Threads create a frictional force that tightly holds two or more objects together, preventing them from slipping apart. This feature is particularly useful when high forces and vibrations are present, such as in aircraft engines or heavy machinery.

Easy Installation and Replacement

Threads are extremely easy to install and replace. This is because they require a screwdriver or wrench to make the necessary adjustments.

Provides a Strong Hold

Threads provide a strong hold between two objects. This is because they use threads designed to interlock and hold tightly, preventing motion between the objects. Additionally, the threads can be designed to have a large surface area, which increases the load-bearing capacity of the screw.

Application of Thread

Fastening: The primary purpose of threads is to fasten two or more objects together. They create a secure bond that can be easily tightened or loosened when needed.

Locking: Threads can be used to lock two or more objects together so that they cannot be easily disassembled. This feature is vital in various mechanical and engineering applications.

Transferring motion: Threads can be used to transfer motion from one object to another. This principle is widely utilized in the mechanics of gears and lead screws in machinery.

Sealing: Threads can be used to create a seal between two objects. Pipe threads, for instance, are crucial for ensuring leak-free connections in plumbing systems.

Specification

Standard	DIN
Name	Thread
Material	Stainless steel,carbon steel and alloy steel, etc.
Grade	Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9
Nominal diameter	M2-M48
Pitch	0.4-5
Surface treatment	ZP,YZ,BLACK,passivated, polished

Types of Thread

Cylindrical Threads

Cylindrical threads, the most common type of screw threads, feature a helical structure formed on a cylindrical surface. These threads are widely used in various fastening applications due to their straightforward manufacturing process and versatile applications.

Conical Threads

Conical threads are formed on a conical surface and are typically used in applications requiring a tight seal, such as pipe fittings. The taper of conical threads helps create a more secure and leak-proof connection.

Specialized Screw Threads

Machine screw threads fit pre-formed threads in nuts or tapped holes, commonly used in machinery and equipment assembly. Self-tapping screw threads can drill and form their own threads in materials, eliminating the need for pre-tapped holes and providing strong connections. Self-drilling tapping screw threads combine drilling and tapping into one operation, efficient for quick assembly in sheet metal and other materials.

Thread Types Based on Cross-Sectional Shape

Triangular Threads: Common in both Unified and Metric threads, these are characterized by a triangular profile and used in general fastening applications.

Rectangular Threads: Featuring a rectangular cross-section, these are used in applications requiring high axial load-bearing capacity.

Trapezoidal Threads: With a symmetrical trapezoidal profile, these are ideal for power transmission applications like lead screws in linear actuators.

Saw Threads: Asymmetrical and resembling a saw tooth, these threads are designed to transmit high forces in one direction.

Round Threads: Used in sliding applications, these threads can absorb significant forces and are suitable for repeated assembly and disassembly.

Common methods of thread processing

Thread Milling
Thread milling is a method for cutting threads into a part or workpiece, but with a tool that has a limited contact area with the workpiece. For internal threads inside holes, the thread milling cutting tool has a smaller diameter than the hole and rotates at a relatively high speed as it moves in a circular path around the circumference of the hole. In this way, thread milling is different from tapping, as a tapping tool has a diameter that matches the hole to be threaded, and is in contact with the workpiece along its entire circumference while tapping the hole.

Thread Turning
Thread turning is a method used to create screw-like grooves, known as threads, on a cylindrical object or inside a hole. This process is usually done on a machine called a lathe.During thread turning, the workpiece (the rod or tube) spins, while a special cutting tool moves along it. This tool cuts the threads into the surface of the workpiece, similar to the threads you see on a bolt or the inside of a nut.

Thread Rolling
Thread rolling is a type of threading process which involves deforming a metal stock by rolling it through dies. This process forms external threads along the surface of the metal stock. Internal threads can be formed using the same principle, specifically termed thread forming. In contrast with other widely used threading processes such as thread cutting, thread rolling is not a subtractive process. This means it does not remove metal from the stock.

Thread grinding
Thread grinding is a process that uses equipment to shape a grinding wheel into the precise shape of a thread. It cuts a specific pattern into the workpiece, which slowly rotates while moving axially. The grinding wheels are monitored and re-dressed (dressed) throughout the process to ensure the highest precision of the threads. In addition, grinding wheels are capable of grinding heat-treated parts, eliminating any distortion that may occur during heat treatment. Therefore, it is mainly used for precise and precise tool and gauge work for the production of different threaded components.

Thread crushing
A nut or screw type thread grinding tool made of soft material such as cast iron is used to grind the machined threads of the workpiece in the forward and reverse direction to improve the pitch accuracy. Hardened internal threads are also usually ground to eliminate deformation and improve accuracy.

Tapping and Threading
Tapping is the process of screwing a tap into a pre-drilled bottom hole in a workpiece with a certain torque to produce internal threads.

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 the difference between the NPT thread and a metric thread?

A: NPT is a US standard 60-degree tapered pipe thread. The metric thread has a flat top and an arc-shaped bottom, which is expressed by the pitch. The number of threads per inch expresses the US and British threads.

Q: What are the differences between coarse and fine threads in terms of application and performance?

A: Coarse threads, characterized by their larger pitch, are typically used in applications where installation speed and ease are crucial, such as in building, woodworking, and general-purpose tasks. They are more resistant to stripping and cross-threading but provide lower precision and load-bearing capacity. Fine threads, with their smaller pitch, are preferred in high-stress, precision applications like aerospace and medical equipment, offering better tensile strength and accuracy. However, they require more time to install and are more susceptible to stripping if not properly handled, but they excel in environments with significant vibration.

Q: What are the implications of surface roughness on screw thread performance?

A: Surface roughness significantly impacts screw thread performance by increasing friction and wear, which shortens the connection’s lifespan. Rough surfaces can destabilize fits, reduce fatigue strength due to stress concentrations, and worsen corrosion resistance. Additionally, higher surface roughness can lead to faster preload decay and increased likelihood of loosening, while smoother surfaces enhance anti-loosening performance, endurance limits, and reduce fretting and galling. Therefore, maintaining a smooth surface finish is crucial for optimizing the durability and reliability of threaded connections.

Q: How to choose the right threading method for a specific product?

A: Selecting a thread manufacturing process suitable for a specific need requires a comprehensive consideration of requirements analysis, process evaluation, technical feasibility, cost-benefit analysis, sustainability and environmental impact, and subsequent handling and maintenance. Through detailed analysis and evaluation, the thread manufacturing process that best meets the actual situation and needs is selected to ensure product quality and production efficiency while reducing production costs and protecting the environment.

Q: How does threading affect product quality and performance?

A: The impact of thread processing on product quality and performance is mainly reflected in aspects such as strength and load-bearing capacity, sealing, precision, surface quality, self-locking performance, production efficiency and cost, energy consumption and environmental protection. In actual production, it needs to be based on the product’s Select appropriate thread processing methods and parameter settings based on specific needs and characteristics to ensure that the strength, sealing, precision and self-locking performance of the product meet the requirements. At the same time, we also need to pay attention to the impact on production efficiency, cost and environmental protection.

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

flat washer, Stainless Steel Round Head Screws, Hexagon Head Combination Bolts