China Lock Nuts Manufacturers Suppliers Factory - Customized Lock Nuts Made in China

Sanwei:Your Professional Lock Nuts 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.

Locknuts
Standard: DIN985. Name: Anti Loosening Nut. Material: Carbon steel and alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8
Metal Self Locking Nuts
Standard: DIN980. Name: Metal self-locking nuts. Material: Carbon steel and alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8
Clamp Nut
Standard: DIN7967. Name: Fastening nuts. Material: carbon steel and alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8
Nylon Nut
Standard: DIN7040. Name: Nylon Lock Nuts. Material: carbon steel and alloy steel, etc.. Grade: Grade 4.8, 5.8, 8.8

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 Lock Nuts

‌Good anti-loosening effect‌: Lock nuts can provide stable locking effects under various working conditions through different design principles, such as increased friction and elastic deformation. For example, all-metal lock nuts increase the friction between threads through the deformation of the thread bottom hole or the deformation of the thread tooth profile, thereby preventing loosening‌. Non-metallic insert lock nuts form a tight fit on the bolt thread through nylon inserts, generating friction resistance to achieve the purpose of anti-loosening‌.

‌Wide range of application‌: Lock nuts are suitable for a variety of working conditions and environments. All-metal lock nuts perform well under vibration conditions and can provide high anti-loosening reliability‌. Non-metallic insert lock nuts are suitable for occasions with impact vibration and will not damage the surface coating of the bolt‌.

‌High reliability‌: The design of lock nuts enables them to maintain stable performance in various complex environments. For example, when all-metal lock nuts are repeatedly installed, although the anti-loosening effect will be weakened, they still have a certain degree of reliability‌.

‌Easy to install and maintain‌: The design of the lock nut makes it relatively simple to install and maintain. For example, all-metal lock nuts can be reused, but the repeated installation should not exceed 5 times‌. Non-metallic insert lock nuts can also be reused, but the anti-loosening effect will gradually weaken and it is not suitable for high temperature environments‌.

‌Multiple types to choose‌: There are many types of lock nuts, such as all-metal lock nuts, non-metallic insert lock nuts, slotted and closed lock nuts, etc. Each type has its specific application scenarios and advantages. Users can choose the appropriate type according to their specific needs‌.

Specification

Standard	DIN
Name	Lock Nuts
Material	Carbon steel and alloy steel, etc.
Grade	Grade 4.8, Grade 5.8, Grade 8.8
Nominal Diameter	M2-M48
Pitch	0.4-5
Finish	ZP,YZ,BLACK

Application of Lock Nuts

Automotive

In the automotive industry, lock nuts play a vital role in securing engine mounts, suspension systems, braking assemblies, and wheel hubs, preventing loosening due to vibrations and dynamic loads. Their use is essential in maintaining the safety and reliability of vehicles, from daily commuters to high-performance machines.

Aerospace

In aerospace, lock nuts are essential for securing critical components like landing gear, steering systems, and engine parts, ensuring they stay fastened under extreme conditions. These nuts are pivotal in maintaining the structural integrity and safety of aircraft, contributing to the overall reliability of air travel.

Machinery

Lock nuts are indispensable in machinery, securing moving parts in industrial equipment, conveyor systems, and robotic arms to prevent loosening from continuous vibrations. Their application ensures the smooth operation of complex machines, reducing downtime and maintenance costs.

Construction

In construction, lock nuts secure structural components such as steel frameworks, scaffolding, and parts of heavy equipment, ensuring stability and safety. By maintaining the integrity of these structures, lock nuts help prevent accidents and enhance the durability of construction projects.

Electronics

In electronics, lock nuts fasten circuit boards, enclosures, and mounting brackets, keeping components stable despite minor vibrations and thermal expansion. This stability is crucial in maintaining the performance and longevity of electronic devices, from consumer gadgets to industrial control systems.

Metalworking

In metalworking, lock nuts secure machine tools, fixtures, jigs, and cutting equipment, ensuring stability during operations and preventing loosening from vibrations and cutting forces. Their use is vital in achieving precision and reliability in metalworking processes.

Types of Lock Nuts

Nylon Insert Lock Nuts
The benefit of a nylon insert lock nut (often called a Nylock nut) is the locking mechanism that is enabled by a nylon collar insert. This design makes the nut resistant to vibration and torque loosening, making them perfect for applications that require strength and durability.

Metal Lock Nuts
The all metal construction of metal lock nuts are ideal for use in environments where high temperatures could damage polyamide or plastic locking mechanisms. Using a twisted thread pattern, the nut locks itself into place, meaning that even under high degrees of stress or high vibration, if an R-pin we to become undone the nut has its own locking resistance to not move around.

Self-locking Nuts
Self- locking Safety Nuts Self locking nuts or prevailing torque nuts are one of the simplest and most successful way to prevent a fastening coming loose under vibration even in the most hostile environments. This is achieved largely via a number of built-in features like deformed threads or inserts and that same consistent resistance to vibration and torque.

Cut Nuts
Slotted nuts: slotted nuts are commonly known as cut nuts; slots cut into the body of the nuts for the tightens its with the help of a cotter pin or wire. The nuts are also lock nuts and these kinds of nuts are a type of nut with a special feature that holds the nuts together and they do not loosen due to vibration or dynamic load conditions where the nut may become loose.

Lock Nuts
Lock nuts are hard, fixed nuts that can be unlocked using tools and are resistant to vibrations and torque. Different fastener types are designed to give fasteners strength and security to enable them to be used in challenging applications.

Flange Lock Nuts
Flange-lock nuts are a type of nut that combine a flange and a nut so that it can distribute the load over a larger area. This larger area makes the fastener less likely to loosen and more prone to resisting corrosion. These nuts are made to resist loosening under dynamic loads, making them well suited for applications where loosening can be commonplace.

Threaded Insert Lock Nuts
Threaded insert lock nuts, otherwise called self-locking threaded inserts or helicoil inserts, are intended to give a strong threaded connection against vibrating, fastening, or wearing out in materials that are too delicate or thin to hold a conventional tapped thread. These inserts are commonly used to repair stripped threads or to provide a strong new threads in the new install applications.

Lock nut anti-loosening method

Riveting and anti-loosening

After tightening, punching points, welding, bonding and other methods are used to make the lock nut pair lose the characteristics of the motion pair and become an inseparable connection. The disadvantage of this method is that the bolt can only be used once, and the disassembly is very difficult, and the bolt pair must be destroyed before it can be removed.

Mechanical anti-loosening

The relative rotation of the lock nut pair is directly restricted by the lock nut stopper. Such as the use of tooth pin, series wire and stop washer. Because the lock nut stopper has no pre-tightening force, the lock nut stop function works only when the lock nut nut is loosened to the stop position. Therefore, in practice, the lock nut does not prevent loosening but avoids falling.

Structure anti-loosening

It is a lock nut replica body structure, that is, a Down's lock nut anti-loosening method.

Friction prevention

This is the most widely used anti-loosening method. This method generates a positive pressure between the lock nut pair that does not change with external forces, so as to generate a friction force that can prevent the relative rotation of the lock nut pair. This positive pressure can be achieved by pressing the lock nut pair axially or simultaneously. Such as the use of elastic washers, double nuts, self-locking nuts and insert lock nuts.

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 are Locking Nuts Made of?

A: For heavy-duty and industrial applications, all metal lock nuts such as stainless-steel lock nuts, mild steel, zinc, or brass locking nuts are preferred. However, part-nylon or all-plastic lock nuts are also popular in many applications, provided the torque forces they will need to withstand are not too severe.

Q: What is the difference between lock nuts and stop nuts?

A: Lock nuts and stop nuts both prevent loosening under vibration and torque, but they differ in design and application. Lock nuts encompass various types, including all-metal and nylon insert variants, suitable for high-stress and high-temperature environments. Stop nuts, a specific type of lock nut, feature a nylon insert that adds friction, making them effective in moderate environments but less ideal for high temperatures. While lock nuts offer broader versatility, stop nuts are particularly useful in automotive, electronics, and construction industries where reusability is important.

Q: How do lock nuts work?

A: Lock nuts work by employing additional locking mechanisms beyond simple friction to prevent bolts and screws from loosening under vibration, shock, or dynamic stress. These mechanisms can be friction-based, such as nylon insert nuts (Nyloc nuts) which create friction through a deformed nylon insert, or serrated flange nuts with serrations that grip the mating surface. Alternatively, positive locking devices like pin locking nuts use a stainless steel ratchet pin, and castle nuts secure bolts with cotter pins or safety wire, ensuring the nuts remain securely fastened in various mechanical applications.

Q: Can lock nuts be reused?

A: The reusability of lock nuts depends on their type. Nylon insert lock nuts, commonly known as Nyloc nuts, are generally not recommended for reuse as the nylon insert can degrade with each use, reducing their locking effectiveness. In contrast, all-metal lock nuts can often be reused if the threads remain undamaged and proper torque values are maintained. For safety-critical applications, it is advisable to replace lock nuts after removal to ensure reliability. The specific application and environmental factors, such as exposure to high temperatures or chemicals, also play a crucial role in determining whether a lock nut can be reused.

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

Nylon Nut, lock nuts, 18mm lock nut