Specializing in the production of special precision screws and nuts of various standards such as Chinese standard GB, Japanese standard JIS, British BS, American ANSI and ISO.
At present, the smallest screw diameter that our company can produce is 0.4mm, the shortest is 0.4mm, and the longest is 300CM.
Name Specification: Thread Wood Tapping Screw M4*20
Reference standard: JIS/ANSI/DIN/BSI
Surface Treatment: Black Zinc Palting
Salt spray time: 24 hours / HIGH SALT SPRAY: 24H
Product Specifications: M4*L20
Nominal length: L30mm±0.8
Nominal diameter: 4mm±0.1
Origin: CHINA
Material: Low Carbon Steel
Thread Wood Tapping Screw M420 is a wood self-tapping screw, model M420, suitable for fastening soft materials such as wood and plastic. It has a self-tapping function and can drive threads directly into the wood without pre-drilling first.
Features
High corrosion resistance: The surface treatment adopts black zinc electroplating, which can effectively improve the corrosion resistance of the screws and is suitable for outdoor or humid environment.
Strong durability: After high salt spray test, 24 hours corrosion resistance, can withstand harsh environmental conditions.
Precision size: The nominal length of the screw is 30mm, the tolerance is ±0.8mm, the nominal diameter is 4mm, and the tolerance is ±0.1mm, ensuring the accuracy and consistency of the screw.
Process introduction
The manufacture of this screw uses low carbon steel as the base material, and undergoes advanced machining and surface treatment processes such as black zinc electroplating to enhance its corrosion resistance and aesthetics. In addition, the product has been subjected to a 24-hour salt spray test to ensure that it still has excellent anti-corrosion performance in harsh environments.
Specific application range
Thread Wood Tapping Screw M4*20 is widely used in the following fields:
Wood processing: Suitable for fastening of wood, plywood and other soft materials.
Furniture manufacturing: Used to assemble furniture such as bed frames, tables and chairs.
Construction industry: In wooden structure buildings, it is used to connect wood components.
Electrical and electronic products: used to fix electrical components and equipment housings.
Precision
Thread Wood Tapping Screw M4*20 has high precision and a very small tolerance range (such as nominal length 30mm±0.8mm, nominal diameter 4mm±0.1mm), which ensures the consistency and accuracy of each screw during installation and provides a reliable fastening effect.
FAQ
Why do screws rust?
The surface of the screw is treated with black zinc electroplating. Although it has good corrosion resistance, it may still rust if it is exposed to a humid environment for a long time or the electroplating layer is damaged. It is recommended to check the surface of the screw regularly and avoid long-term exposure to humid conditions, or consider using screws with stronger corrosion resistance in more severe environments.
What if the screw is loose?
The screw may loosen due to the expansion and contraction of the wood, especially when the seasons change or the humidity is high. You can check the tightness regularly and retighten it if necessary. To improve the firmness, you can choose screws suitable for the hardness of the wood, or use wood glue to enhance the fixing effect.
What if the screw is difficult to screw into the wood during installation?
If the wood is hard or the screw is long, it may cause difficulty during installation. It is recommended to pre-drill holes in the wood with a drill bit of the appropriate size before installation to help the screws enter the wood more smoothly, reduce damage and installation difficulties.
Will the dimensional tolerance of the screw affect the installation effect?
The dimensional tolerance of Thread Wood Tapping Screw M4*20 is very small (such as length ±0.8mm, diameter ±0.1mm), which ensures the consistency and precision of the screw, so it will not affect the installation effect. It is recommended to ensure that the selected size matches the thickness of the wood applied when selecting the screw.
What types of wood are suitable for the screw?
This screw is suitable for most softwoods and medium-hard woods such as pine, fir, oak, etc. For very hard woods, different specifications or stronger screws may be required to ensure a good fixing effect.
CHEKSINE METAL is a manufacturer specializing in custom metal products. Feel free to reach out for customized solutions to meet your specific needs!
1. We have more than 20 years of experience in exporting to many countries for example America.Japan.Korea.Germany.France.England etc. In fact, we have 20 years of production experience. When the drawings are confirmed, we will provide customers with professional information to make product assembly smoother.
2. Our company have ISO9000.
3. We can give Proposing Solutions and help our customer to solve any fastner system problem.
4.We can reply you price within 2 hours.
5. We can produce samples for you in 5-7 days.
6. We can give you drawings within 2 hours.
7. Working with us can save your time and money.
8.We can confirm 100% quality in diameter and tolerance.
9.More than 90% are returned customers.
10.We not only produce and sell products ,we also can offer you help in China as friend .
11.I would like to help you to reach your dream in my ability ,give me chance is giving yourself chance.
Our logistics information exchange :
Are you factory ?
We are factory.We not only produce customized hardware we also produce test machine to check quality ourselves.This is our big advantage.
How long is your delivery time?
It is according to the product you need and quantity ,usually in 30 days
Can you provide samples ?
Yes, we can supply samples if we have stock.But if its customized , you need pay us mould fee, sample cost.
What drawings format do you need for production?
2D:PDF, CAD, JPG etc.3D: STP,IGS, STL, SAT,PRT,PT etc.
Can you produce according to the samples?
Yes,we can produce accordingto your samples
What can we do if you have any problem on your production line?
If you have any fastners problem on your production line,we will give you solutions quickly.
Dongguan Qisheng Metal Technology Co., Ltd. is a professional manufacturer of screws and nuts and other fastener products integrating R&D, production, processing and sales. The company is located in the famous manufacturing city in China-Dongguan City, Guangdong Province. The company covers an area of 3,000 square meters.
Specializing in the production of special precision screws and nuts of various standards such as Chinese standard GB, Japanese standard JIS, British BS, American ANSI and ISO. Our equipment is advanced. At present, the smallest screw diameter that our company can produce is 0.4mm, the shortest is 0.4mm, and the longest is 300CM. The materials used are stainless steel SUS304 /SUS410/SUS 430 /SUS620, etc., red copper H95, brass C2700, aluminum 6061, titanium TI 04, etc.
Our products can meet the environmental testing standards of the European Union-ROHS, the United States–California 65 standard, Japan-SONY00259 etc., and even more stringent testing standards. At present, our salt spray test standard can reach up to 2000 hours, and the surface hardness can reach up to HV2000.
Our business policy is to serve every customer with the highest quality and fastest speed.
Please feel free to contact us if necessary.
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