China Custom Screw Manufacturer | Screw Suppliers
As a source factory with 19 years of professional fastener manufacturing experience, Zeyao focuses on the R&D, manufacturing, and supply of non-standard screws, nuts, and special fasteners. We have over 160 advanced production machines, with a monthly output exceeding ten million pieces, providing reliable, high-quality screw solutions to customers worldwide. Whether you're a wholesaler or a brand customization client, we offer one-stop service.
Rich Experience
Established in 2006, Huizhou Zeyao Hardware Products Co., Ltd. has accumulated over 19 years of expertise in manufacturing high-quality fasteners.
Quality Control
All our products comply with ROHS standards, and we maintain a stringent quality control system throughout the entire production process to ensure superior product quality.
Customized Services
We offer tailored solutions based on customer requirements, providing customized production according to specific drawings or samples.
Advanced Production Technology
Our production capabilities encompass cold forming, automatic lathing, automatic milling, and CNC machining, enabling us to meet diverse customer needs efficiently.
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![Knurled Head Thumb Screw]()
Knurled Head Thumb ScrewType: Knurled Head Thumb Screwview more
Structure: Knurled Head + Threaded Shaft / Custom Shoulder Design
Thread Size: M2–M12 / Custom Sizes Available
Head Type: Knurled Round Head /... -
![Metric SEMS Screws]()
Metric SEMS ScrewsType: Metric SEMS Screwsview more
Structure: Screw and Washer Assembly
Thread Size: M2–M8 / Custom Sizes Available
Washer Type: Flat Washer, Spring Washer, Custom Washer
Material:... -
![Nylon Thread Locker Screw]()
Nylon Thread Locker ScrewType: Nylon Thread Locker Screwview more
Material: Carbon Steel / Stainless Steel / Alloy Steel / Brass
Surface Treatment: Zinc Plating, Nickel Plating, Black Oxide, Passivation
Head... -
![Soft Tip Set Screw]()
Soft Tip Set ScrewType: Soft Tip Set Screwview more
Product Type: Surface-Friendly Fastener
Application: Aluminum Profiles, Machinery Parts, Fixtures, Precision Assemblies
Material: Stainless Steel, Carbon... -
![O Ring Sealing Screw]()
O Ring Sealing ScrewType: O Ring Sealing Screwview more
Product Type: Sealed Fastener
Application: Machinery Covers, Outdoor Equipment, Control Boxes, Waterproof Panels
Material: Stainless Steel, Carbon... -
![Nylon Tip Grub Set Screw]()
Nylon Tip Grub Set ScrewType: Nylon Tip Grub Set Screwview more
Product Type: Soft Tip / Non-Marring Set Screw
Drive Type: Hex Socket
Application: Machinery, Aluminum Profiles, Instruments, Furniture Hardware,... -
![Stainless Steel Tapping Screws]()
Stainless Steel Tapping ScrewsProduct Type: Self-tapping Screwsview more
Material: Stainless Steel
Origin: Guangdong, China
Certificate: ISO9001:2008
Customization: OEM/ODM -
![304 Stainless Steel Screw]()
304 Stainless Steel ScrewMaterial: 304 Stainless Steelview more
Head Type: Round Head
Drive Type: Cross Head
Customization: OEM/ODM
Manufacturer: zeyao
MOQ: Negotiable
Certifications: ISO 9001, RoHS -
![Phillips Head Tapping Screw]()
Phillips Head Tapping ScrewMaterial: Carbon steelview more
Type: Self-tapping screw
Size: can be customized
Drive method: Phillips head
Manufacturer: zeyao
Customization: OEM/ODM -
![Stainless Steel Tapping Screw]()
Stainless Steel Tapping ScrewMaterial Options: Stainless Steel 201 / 304 / 316view more
Standards: DIN / ISO / ANSI / JIS or custom standards
Thread Type: Self-tapping thread / Thin plate thread
Length Range: 4 mm – 100... -
![High Security Screw]()
High Security ScrewMaterial: Carbon steelview more
Size: Customizable
Brand: zeyao
Origin: China
Surface Treatment: Black anodizing, black zinc plating, nickel plating, plain, zinc plating -
![Stainless Steel Self-tapping Screws]()
Stainless Steel Self-tapping ScrewsMaterial: 304 Stainless Steelview more
Size: Customizable
Strength Grade: A2-70
MOQ: Negotiable
Manufacturer: Zeyao
Specification
|
Nominal Diameter/d |
Dk |
K |
S |
||||
|
Max |
Min |
Max |
Min |
Norma |
Max |
Min |
|
|
M2 |
3.98 |
3.62 |
2 |
1.86 |
1.5 |
1.58 |
1.52 |
|
M2.5 |
4.68 |
4.32 |
2.5 |
2.36 |
2 |
2.28 |
2.02 |
|
M3 |
5.68 |
5.32 |
3 |
2.86 |
2.5 |
2.58 |
2.52 |
|
M3.5 |
6.22 |
6.32 |
3.5 |
3.36 |
3 |
2.78 |
2.52 |
|
M4 |
7.22 |
6.78 |
4 |
3.82 |
3.5 |
3.08 |
3.02 |
|
M5 |
8.72 |
8.28 |
5 |
4.82 |
4 |
4.095 |
4.02 |
|
M6 |
10.22 |
9.78 |
6 |
5.7 |
5 |
5.14 |
5.02 |
Types of Screw
The screws produced by our company mainly include the following types:
Tapping Screw
A tapping screw, also known as a self-tapping screw, is a type of fastener that creates its own thread as it is driven into a material. This eliminates the need for a pre-drilled hole or a separate tapping process to create a female thread for the screw to engage with.
Shoulder Screw
A shoulder screw is a type of fastener that features a cylindrical, unthreaded shoulder between its head and threaded portion. This design allows for precise spacing and alignment, making them ideal for applications where a screw needs to serve as a shaft, guide, or spacer.
Set Screw
A set screw is a type of screw, typically headless and fully threaded, used to secure one object within another, often a shaft or gear to a hub. They're designed to bite into the mating surface, preventing movement.
Sealing Screw
A sealing screw is a type of screw designed to create a tight seal between the fastener and the mating surface, preventing the entry of contaminants like liquids, gases, or debris. This is typically achieved through an O-ring or another sealing mechanism built into the screw head or shank.
Zeyao Factory Advantages
Zeyao is a Chinese factory with 19 years of professional experience in producing non-standard fasteners, focusing on the R&D and production of various screws, nuts, and specialty fasteners. Our technical team provides mature and reliable solutions for different industrial needs, strictly controlling every step from design and production to quality inspection to ensure products maintain excellent performance under high intensity, vibration, or special environments.
The factory boasts over 160 advanced production equipment, including precision thread cutting machines, CNC machine tools, automated assembly lines, and multi-functional testing instruments.
Zeyao's monthly output exceeds ten million pieces, capable of meeting the needs of large-volume orders and providing rapid response to urgent orders. Large-scale production capacity combined with strict quality management ensures on-time delivery of every order while maintaining high-quality standards.
We offer comprehensive customization services, supporting customers in customizing the appearance, structure, function, material, surface treatment, logo engraving or labeling, and packaging methods of screws, among other services. Whether for industrial applications, consumer electronics, or automotive parts, we can provide customized solutions to meet your specific needs, helping brand clients enhance their product competitiveness.
Zeyao products are certified by international standards including ISO9001, BSCI, CE, RoHS, and FDA, meeting the standards of global markets such as Europe, America, Southeast Asia, and the Middle East. Rigorous quality control processes and laboratory testing ensure that every product withstands the test of performance and durability, guaranteeing worry-free use for our customers.
The factory is fully equipped
Zeyao, as a professional custom screw manufacturer, has 19 years of experience focusing on the production of non-standard fasteners. The factory is equipped with 160+ advanced production equipment, including precision thread rolling machines, thread tapping machines, thread lathes, CNC thread turning centers, multi-functional thread grinding machines, high-precision measuring instruments, etc.
- Fastening objects securely.
- Fine-tuning and adjusting mechanisms.
- Transmitting power for linear motion.
- Clamping and gripping components.
- Sealing containers and pipes.
- Precise positioning in instruments.
- Accurate measurement devices.
- Distributing loads evenly.
- Constructing threaded joints for pipelines.
- Creating threaded inserts for materials.
Difference Between Bolt and Screw
|
Bolts |
Screws |
|
Bolt is an externally threaded fastener that is designed for insertion through holes in assembled parts and is typically intended to be tightened or released by rotating a nut. |
A screw is an external threads fastener capable of being inserted into holes in assembled parts, mated with a prefabricated internal thread or forming its own thread, and tightened or released by turning the head. |
|
Bolts generally have similar cross-sections. |
Screws generally have a non-uniform cross-section. |
|
Bolts are always used with nuts. |
It is not used with dry fruits but alone. |
|
Threads on the bolts are spiral in structures. |
The threads on screws are helical in structures. |
|
It does not have a thin shank. |
It has a slender or pointed leg. |
|
Most wrenches and spanners are needed for the purposes of tightening and loosening bolts. |
Most screwdrivers are needed for the purposes of tightening and loosening the screw. |
|
The parts connected with a bolt have more strength than the screw |
The parts connected with the screw have less strength than the bolt. |
|
It is more reliable. |
It is less reliable. |
|
They apply compression to the parts to which they are attached. |
They do not apply compression to the parts they are attached to. |
|
The parts to be joined with the bolt must have holes for its insertions. |
The Holes may or may not be required in parts that need to be attached to the screw. In most cases, it is screwed directly to parts to be joined. |
|
Bolts are found in small as well as large sizes. |
The size of the screw is smalls or medium. It is not found in very large sizes. |
Screw Production Steps
Heading
Wire is fed from a mechanical coil through a straightening machine. The straightened wire flows directly into a machine that automatically cuts the wire to length and die cuts the head of the screw into the shape required.
Cutting the Thread
Once cold headed, the screw are automatically fed to the thread-cutting machine. The screw is then cut using one of two different techniques. In the reciprocating die, two flat dies are used to cut the screw thread. One die is stationary, while the other moves in a reciprocating manner, and the screw blank is rolled between the two.
Heat Treatment
Heat treating the screws increases it's overall durability. The screws are heated to a high temperature (about 900C/1652F), and then dipped into water. This sudden change in temperature hardens the bolt or screw material.
Coating
The type of coating is determined by the screws use. The main concern for screws is their corrosion resistance, so a zinc-plated coating is a common choice. This is a process where the screw is submerged in a liquid containing zinc, and an electric current is applied so that the zinc bonds to the screw forming a coating over the surface.
Customizable Options for Screws
Gauge and shaft length
1
>>
Head and body style
2
>>
Thread type, pitch, and angle
3
>>
Pan head thickness
4
>>
Material and finish
5
>>
Drive Type
6
>>
Point features
7
Packaging and Shipping
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Packaging |
Plastic bag + outer carton + pallets |
|
Shipping |
We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc. |
Our Certificate
FAQ
We're professional screw manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale customized screw made in China here from our factory.
