China Locking Nut Manufacturers Suppliers Factory - Customized Locking Nut Wholesale

Nut Factory | One-stop custom Locking Nut manufacturer

Established in 2006, Huizhou Zeyao Hardware Products Co., Ltd. is a leading manufacturer of non-standard fasteners in China, boasting 19 years of professional production experience. The company focuses on the R&D and production of various screws, nuts, bolts, washers, pins, and custom-made fasteners, providing high-performance fastener solutions to the automotive, industrial machinery, construction engineering, electronic equipment, and rail transportation industries.

ZEYAO possesses over 160 advanced production lines, including cold heading machines, CNC machining centers, automatic lathes, and secondary processing equipment, enabling it to scale from small-batch pilot production to large-scale mass production. The company's monthly output exceeds 10 million pieces, and it maintains long-term partnerships with over 3,500 domestic and international clients.

ZEYAO not only provides standard fasteners but also dedicates itself to providing comprehensive custom-made services, including material selection, structural design, locking performance optimization, and surface treatment solutions.

Thin-Profile Nylon-Insert Locknuts
The thin-profile nylon-insert locknut combines the durability of galvanized steel with the self-locking of a nylon insert, which provides a secure and reliable fastening solution. The nylon insert...
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Distorted-Thread Locking
The distorted-thread locking nut is an advanced fastening solution designed to prevent loosening and enhance vibration resistance through its unique 30° wedge-shaped thread design. This innovative...
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Locknuts with External-Tooth Lock Washer
The locknuts with an external-tooth lock washer is a unique fastener designed to combine the functions of a washer and a nut in one reliable component. With its large flange design on one end and...
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Locknuts for Use with Cotter Pins
The locknuts for use with cotter pins are specially designed to securely fasten components such as wheels and axles, ensuring the reliable and safe operation of vehicles and machinery. These...
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Steel-Insert Locking
The steel-insert locking nuts are designed to prevent loosening and ensure secure connections, especially in applications subject to vibrations. The core feature of steel-insert locking nuts is...
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Specification

Diameter D	Pitch P	H		S
Diameter D	Pitch P	Max	Min	Max	Min
M3	0.5	4	3.7	5.3	4.92
M4	0.7	5	4.5	7	6.78
M5	0.8	5.3	4.8	8	7.78
M6	1	5.9	5.4	10	9.78
M8	1/1.25	7.1	6.44	13	12.73
M10	1/1.25/1.75	9	8.04	16	15.73
M12	1.25/1.5/1.75	11.6	10.37	18	17.73
M14	1.5/2	13.2	12.1	21	20.67
M16	1.5/2	15.2	14.1	24	23.67
M18	1.5/2/2.5	17	15.01	27	26.16
M20	1.5/2/2.5	19	16.9	30	29.16
M22	1.5/2/2.5	21	18.1	34	33

Locking Nut Case Study

Anti-loosening Nuts for Automotive Engine Components

Client Background: A German automotive parts OEM manufacturer needed locking nuts for use in high-vibration environments like engines.

Challenge: Standard nuts are prone to loosening under vibration, affecting engine reliability.

ZEYAO Solution:

Customized locking nuts, optimizing thread and nut height.

Used high-strength alloy steel with nickel plating for corrosion protection.

Provided small-batch pilot production and functional testing.

Result: The nuts maintained 100% tightening force during long-term vibration testing. The client successfully mass-produced and applied them to automotive engines, and the partnership continues to this day.

Nuts for Industrial Automation Equipment

Client Background: An American industrial machinery company producing high-precision automated assembly lines.

Challenge: Loosening nuts during equipment operation caused production downtime, impacting efficiency.

ZEYAO Solution:

Customized flange locking nuts, increasing contact area

Optimized locking mechanism design to ensure stable torque

Provide batch customization and full-process quality inspection

Results: Improved equipment operational stability, significantly reduced downtime, and customer feedback: "ZEYAO is a reliable long-term partner."

Locking Nuts for Rail Transit Projects

Customer Background: Asian high-speed rail construction project requiring nuts that can withstand high vibration and temperature differences.

Challenge: Harsh environment, insufficient durability of standard nuts.

ZEYAO Solution:

All-metal locking nuts, made of high-strength alloy steel

Surface coated with Dacromet anti-corrosion coating

Provide full support from design and sampling to mass production

Results: Nuts successfully applied to high-speed train body fastening, with the customer highly satisfied with product performance and delivery time

Advantages of Locking Nut

Vibration Resistance

The nylon insert inside the nut creates friction against the bolt threads, which helps prevent the nut from coming loose due to vibrations and shocks. This makes nylon lock nuts ideal for applications where machinery, vehicles, or equipment experience continuous movement or external forces.

Temperature Stability

Nylon lock nuts maintain their locking capability over a broad temperature range. The nylon insert retains its properties in both high and low-temperature environments, ensuring consistent performance.

Reusable

While nylon lock nuts provide excellent locking capabilities, they can be removed and reused multiple times without significantly compromising their effectiveness. This reusability is advantageous in applications requiring maintenance or component replacements.

Locknuts with External-Tooth Lock Washer

Versatility

Nylon lock nuts are compatible with various bolt types and materials, allowing them to be used in diverse applications across industries.

Applications of Locking Nut

Automotive

Locking nuts are used extensively in the automotive industry for securing critical components such as wheel assemblies, suspension systems, and engine parts. Their vibration resistance ensures that fasteners remain secure, even under challenging road conditions.

Machinery and Manufacturing

In manufacturing and machinery, locking nuts are used to secure moving parts and components. Their ability to withstand vibrations makes them suitable for heavy-duty machinery.

Construction

Locking nuts are utilized in construction applications for anchoring structural components and securing critical connections that must withstand wind, seismic activity, and other forces.

Aerospace and Aviation

In the aerospace and aviation sectors, locking nuts are used in various critical applications to ensure the integrity of aircraft components, including engines, landing gear, and avionics.

Marine

Locking nuts are ideal for marine applications due to their resistance to corrosion and vibrations. They are used to secure components on boats, ships, and offshore structures.

OEM/ODM Customization

Non-standard Locking Nuts - Full Customization

Customization options include:

Thread specifications and pitch (metric/imperial/special threads)

Nut height, width, and flange size

Locking mechanism design (nylon lock, metal deformation lock, double locking)

Torque performance customization

Structural reinforcement or lightweight design

Compatibility with bolts or screws

Material Customization Options

Carbon steel (low/medium/high carbon)

Alloy steel

Stainless steel (304, 316, 316L, etc.)

Brass

Aluminum alloy

Special alloys (customizable upon request)

Surface Treatment and Coating Selection

Zinc plating (white zinc, yellow zinc, black zinc)

Nickel plating

Phosphating

Black anodizing

Dacromet coating

PTFE/Teflon coating

Custom corrosion-resistant coating

Our Certificate

productcate-1-1

FAQ

Q: What is the standard locking nut width?

A: A 10mm lock nut is a common width for many types of jobs and applications, although again, this is far from the only width available. Usually given in mm, standard sizes for locking nut widths include 5.5mm, 6mm, 7mm, 8mm, 11mm, 12mm, and 13mm.

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: How does a locking nut work?

A: Locking nuts prevent loosening by creating friction or a positive locking mechanism, like a nylon insert or a cotter pin, which resists vibration and movement. This ensures the connection remains secure.

Q: Why would you choose a locking nut instead of a standard nut?

A: Locking nuts or lock nuts are special types of fastener designed to achieve a secure fixing. Some suppliers call them self-locking nuts or stiffnuts. They are screwed onto a bolt or threaded rod just like standard nuts, but a lock nut will then resist loosening under torque or vibration forces.

Q: Are locking nuts permanent?

A: Even though these are considered lock nuts, they are not permanently locked, which means maintenance or making adjustments can be carried out.

Q: How long do lock nuts last?

A: These are found in lower temperature applications, typically less than 177°C due to the polymers within the nylon lock nut. They provide desirable reusability and can be used assuredly up to fifteen times after an initial fastening.

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

Locknuts with External Tooth Lock Washer, nut, Thin Profile Nylon Insert Locknuts