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What Are Non-Standard Screws
 

Compared to standard screws, non-standard screws are custom-made for businesses or individuals. In other words, the same type of non-standard shaped screws may not be applicable to other products and industries. Standard parts are different, any industry, any product is applicable. Non-standard screws refer to screws that deviate from traditional sizes, shapes, or materials used in standard screws. These screws are designed for specialized applications where standard screws may not provide the required security, tamper resistance, or functionality.

 

Advantages of Non-Standard Screws
01/

Positioning and fixing
The main function of non-standard screws is to connect, fix or position various parts, such as mechanical equipment, electronic products, furniture, etc. By screwing in non-standard screws, different parts can be firmly fixed together to ensure that their positions remain unchanged.

02/

Transfer load
Some non-standard screw designs have a certain load-bearing capacity and can withstand a certain amount of tension, shear force or torque to maintain the stability of the assembly structure.

03/

Anti-loosening
The self-locking design of non-standard screws, special thread shapes or screw attachments can effectively prevent the screws from loosening during vibration or work and maintain the safety of the connections. 

04/

Aesthetic function
Some non-standard screws also have a decorative effect, which can improve the appearance quality of the product and make the product more aesthetically pleasing.

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1.Professional team
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We have obtained ISO9001and IATF16949 Certificates. And also get SGS along with TCT product certificates.
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Our products not only share big market in China but also export to many other countries for more than 10 years, such as Europe, Middle East and Central Asia.
4.Complete after-sale service
Our management idea is profession, learning, innovation and transcendence. We are ready to provide products of high quality and the best service for our customers.

 

Non-Standard Screws, Why More and More Popular?
 

With the rapid economic development, more and more companies choose to customizenon standard screw fastener, special screws are also widely used in all walks of life, machinery, petrochemicals, electronics, chemicals, food, automobiles, there are some fast-selling goods industry, is a product that fastens the connected product.

 

The use of non standard screws allows companies to save a lot of installation time. Like some of the electrical and electronic manufacturers use screw fasteners, custom non standard screws can greatly improve the efficiency of the installation screw, reducing the labor-saving and enterprise costs. Non standard screws customized to meet the needs of companies. Can imagine, in order a screw to change a product design easier, or according to the needs of the product to customize a screw easier? I believe everyone knows how to choose. Customized non standard screws can be customized according to the needs of the enterprise products, saving the company’ s R & D design time and improve efficiency.

 

In addition to the role of fastening connections, non-standard screws also have a certain aesthetic effect. Some non-standard screws need to be exposed due to product design. Non-standard screws can be customized so that the screw neat appearance, beautiful and unique appearance and personality. Non-standard screws can be customized to use in different environments. According to different use environment to customize different specifications and sizes of non-standard screw fasteners, a very wide range.

 

The Function of Non-standard Screws

 

Non-standard screws are often used in daily life, and the application is extensive, from watches and glasses to trains and ships, space shuttles, and many places. Screw custom screws have an important task in the industry; as long as there is an industry on the earth, the function of the screw will always be important. The screw has been a common invention in people's production and life for thousands of years, and according to the field of application, it is the first major invention of mankind. The screw is an invention in the production of people, and according to the field of application, it is also the pride of mankind.

 

The main role of non-standard screws is to link the workspace of the tightening machine parts can also be called special-shaped screws. Non-standard screws are a tool that uses the physical and mathematical principles of the circular rotation and friction of the beveled surface of the object to gradually tighten the mechanical parts of the object. Screws are the common saying for fasteners, everyday colloquialisms. There are many screws that can be connected without a nut. Of course, the basic non-standard screw without a nut plays a key role in linking the parts.

 

Material of non-standard screws: In general, the material of non-standard screws manufactured is high-carbon steel, medium-carbon steel, low-carbon steel, and other materials. The carbon content in carbon steel is different from low carbon steel, medium carbon steel, high carbon steel, and alloy steel). Low carbon steel C%≤0.25% China is usually called A3 steel. Foreign countries are basically called 1008, 1015, 1018, 1022, and so on. It is mainly used for 4.8-grade bolts and 4-grade nuts, small screws, and other products without hardness requirements. Mainly used for 4.8-grade bolts and 4-grade nuts, small screws, and other products without hardness requirements. Note: Drill tail nails are mainly made of 1022 material. Medium carbon steel 0.25% 0.45%. At present, there is basically no use alloy steel on the market: adding alloying elements to ordinary carbon structural steel to increase some particularity of steel: such as 35, 40 chromium-molybdenum, SCM435, 10B38. Non-standard screws are a tool that uses the physical and mathematical principles of the circular rotation and friction of the beveled surface of the object to gradually tighten the mechanical parts of the object.

 

 
 
Non-standard Screw Acceptance Method

The product quality must not be sloppy and must be produced and accepted in strict accordance with the corresponding standards. What are the acceptance standards for non-standard screws?  

Non-Standard Flange Bolt.
01.

First of all, non-standard screws are also the evolution of national standard screws. The specific testing items should also be determined according to the surface defect standards of national standard screws. For details, please refer to the corresponding national standards. If the surface coating and coating affect the identification of surface defects, it should be Pick up before examination. Secondly, according to the requirements of the design drawings, the dimensions and materials of the non-standard screws should be inspected. This should pay attention to the inspection of the material. First, the raw material manufacturer should provide a material certificate report. Second, high-end products must require SGS material certification, and send them to relevant laboratories for material composition analysis to confirm whether the composition content meets the requirements of the drawing material.

02.

The function requires non-destructive inspection again. When non-destructive inspection of non-standard screws is performed, if any quenching cracks on any part, wrinkles on the bearing surface and below are found, and whether the coating meets the environmental protection requirements of RoSH, etc. Then there is the destructive test, such as non-standard screw hardness level to do the corresponding hardness impact test; internal hardness, mechanical properties, torsion test, etc., all of which will damage non-standard screws, but for screw factories with a strong quality concept, this is all Test items must be done.

Non-Standard Self Screw.

 

Are Non-standard Screws Magnetic?

 

 

Why do some non-standard screws stick to the magnet? Stainless steel tightening screws are non-magnetic and one of the biggest misunderstandings among screw users. Non-standard screws are divided into three parts, namely size, mechanical properties and surface defects. The specific inspection items of each part have different regulations according to different products. Custom inspection method for non-standard screws: The inspection method for standard fasteners is specified in the technical conditions of the product. Professional standards have been developed for fastener testing methods (dimension and geometric accuracy). Screw manufacturers will share, why most stainless steel fasteners are at least a little magnetic, and why are they attracted by many magnetic materials or even weak magnets?

 

Non-standard screw materials are divided into five categories: ferrite, austenite, martensite, duplex and precipitation hardening, only one is non-magnetic (austenite). Non-standard screws are divided into three parts, namely size, mechanical properties and surface defects. The specific inspection items of each part have different regulations according to different products. Austenitic is the most commonly used non-standard screw material type in the market. Non-standard screw manufacturers use high-quality austenitic stainless steel. The first four classes are defined based on the microstructure of the metals in the latter class, and the PH is based on their heat treatment. The microstructure of stainless steel is important because this is the magnetic property of stainless steel. The microstructure of metals makes steel magnetic. If the selected stainless steel is austenitic, for example, stainless steel 316, and the local microstructure is changed to the other four categories, then the material will have some magnetic permeability, and the magnetism will be built into the steel. The microstructure of austenitic stainless steels may be transformed through a process called martensitic stress-induced transformation. This is a microstructural change from austenite to martensite, and the stainless steel will have a pronounced martensitic structure due to cold heading and cold rolling. Because martensite is magnetic, austenitic stainless steels that were once non-magnetic were initially magnetic.

 

Several Effective Anti-Theft Designs for Non-standard Screws
Non-Standard Stainless Screws.
Non-Standard Drilling Screw
Welding Screws
Hexagon Socket Head Cap Screw.

Are stainless steel non-standard screws really possible to prevent theft? We see that there are many non-standard screws with pentagonal columns and non-standard screws with hexagonal columns on the market. Are they really likely to play a role in theft prevention? Today, let's talk about the consequences of stainless steel non-standard screws, which kind of stainless steel non-standard screws can effectively prevent theft.

 

First of all, to see whether the non-standard screws are effective, it depends on his disassembly tool. Is it the only one? Is it only possible with this screwdriver? If not, then the anti-theft effect of this non-standard screw is extremely limited. Therefore, if you want to customize effective non-standard screws, you must re-design, from the head shape, groove shape, and tooth pattern of the screw, and then design a matching disassembly tool according to the groove shape of the screw. Different from the non-standard screws in the market, even if there are disassembly tools for non-standard screws in the market, only the groove shape of the screw does not match the specification and graphics of the screwdriver, so it cannot be disassembled naturally.

 

The pentagonal non-standard screw with column is designed and produced by the screw manufacturer according to the customer's request. The diameter of the screw thread is similar to the screw on the market. The head type of the non-standard screw with pentagonal column is , the groove shape is completely different from the non-standard screws on the market. Non-standard screws are divided into three parts, namely size, mechanical properties and surface defects. The specific inspection items of each part have different regulations according to different products. Screw customization, for example, the dimension inspection items for hexagonal nuts are specified as thread general gauge, thread stop gauge, thread minor diameter, opposite side width, diagonal dimension, nut height, and the perpendicularity of the nut bearing surface and the thread axis; while the flat washer is specified as the inner diameter , outer diameter, thickness, coaxiality of the outer circle to the inner hole and flatness, etc. As for the mechanical performance inspection items, hardness and tensile strength are specified for hexagonal nuts, while only hardness is specified for flat washers.

 

 
How Are Non-Standard Screws Manufactured?
 
 

1.Non-standard screws drawing design
In the non-standard screws drawing design, the designer needs to study the product drawings and related technical requirements in detail, and then follow the relevant national standard drawings for processing. It is necessary to use computer-aided design software for two-dimensional analysis of the parts, and then make a three-dimensional analysis of the parts. The finished product should be tested by cad software to find out whether it meets its requirements.

 
 

2.Non-standard screws metal raw materials preparation
After the design of non-standard screws is completed, it is necessary to prepare the materials required for processing according to the drawings through inspection. In this step, we must strictly control the quality of materials that have passed inspection.

 
 

3.Processing
If you want to make a good non-standard special fastener, it must be processed well during processing. The process of processing requires mastering a lot of knowledge, including mechanical theory and cnc programming language knowledge.

 
 

4.Inspection
After processing, it is necessary to carry out strict inspection on the products in order to ensure that every dimension meets its standards.

 

 

Common Types of Non -Standard Screws and Use Occasions
 
 

Non

Standard screws are mainly used for suspension and fixing of air -conditioning pipes, water pipes, electric pipes, ceilings, etc. Twist -type flat -headed non -standard screws can be used on cement concrete, brick walls, and hollow bricks to fix the bathroom equipment.

 
 
 

Internal teeth non

Standard screws are used for fixing of marble, water pipes, electric pipes, and corner iron. Non -standard screws, mainly used for the fixing of sound insulation walls and bathroom equipment. The non -standard screws of external internal teeth are mainly used for the hanging pipes of water pipes, electric pipes, and air conditioners, and the fixing of various corner iron and type steel.

 
 
 

Twist

Type sleeve non -standard screws are used to fix the lighting, light steel dragon skeleton, and bathroom equipment. Non -standard screws are suitable for the fixing of door frames, cabinet frames, bathroom auxiliary equipment, and wall accessories.

 

 

 
Our Factory
 

 

Wuxi AoTian Steel Wire Products Co., Ltd (original: Wuxi HuaTian Standard Piece and Wire Drawing Co., Ltd) was founded in 2000. Our company specializes in manufacturing advanced steel wire products, such as carbon steel spheroidized wire, alloy steel spheroidized wire and rivet wire for cold heading and so on. Our production capacity can reach 40,000 ton per year. Our products are widely used in making auto, aerospace and ship fasteners, precisional electronic screws, high strength bolts and nuts and self-drilling screws and other irregular parts and so on.

 

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Our certificate
 

 

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FAQ
 
 

Q: What are the common types of non-standard screws?

A: Common types of non-standard screws include security screws, tamper-resistant screws, specialty screws, and custom-designed screws.

Q: What is the purpose of using non-standard screws?

A: Non-standard screws are often used for specialized applications where standard screws may not provide the required security, tamper resistance, or functionality.

Q: How do non-standard screws differ from standard screws?

A: Non-standard screws may have unique head shapes, drive types, thread patterns, or materials that set them apart from traditional standard screws.

Q: Are non-standard screws commonly used in industrial applications?

A: Non-standard screws are frequently used in industrial settings where specific requirements such as security, precision, or customization are essential.

Q: Can non-standard screws be customized for specific applications?

A: Yes, non-standard screws can be customized in terms of size, shape, material, and features to meet the unique needs of a particular project or industry.

Q: What are security screws, and where are they typically used?

A: Security screws have specialized drive designs that require unique tools for installation, making them ideal for applications where tamper resistance and security are crucial, such as in electronics or public infrastructure.

Q: Are non-standard screws more expensive than standard screws?

A: Non-standard screws can be more expensive than standard screws due to their specialized design, materials, or manufacturing processes.

Q: What are tamper-resistant screws, and why are they important?

A: Tamper-resistant screws have features that prevent unauthorized removal, making them essential for applications where security and safety are paramount, such as in public facilities or equipment.

Q: Can non-standard screws be made from exotic materials?

A: Yes, non-standard screws can be manufactured from exotic materials like titanium, Inconel, or ceramic for applications requiring high strength, corrosion resistance, or extreme temperatures.

Q: How are non-standard screws designed for specific industries?

A: Non-standard screws can be tailored for industries such as aerospace, automotive, medical, or electronics to meet stringent requirements for performance, reliability, and safety.

Q: What are the benefits of using specialty screws in construction projects?

A: Specialty screws in construction projects offer advantages such as improved structural integrity, enhanced aesthetics, or specific performance characteristics tailored to the project requirements.

Q: Can non-standard screws be used in high-pressure or high-temperature environments?

A: Non-standard screws can be engineered to withstand extreme conditions like high pressure, high temperature, or corrosive environments by using specialized materials and coatings.

Q: Are non-standard screws subject to industry regulations and standards?

A: Non-standard screws may need to comply with industry-specific regulations, standards, or certifications depending on the application and industry requirements.

Q: What are the considerations when selecting non-standard screws for a project?

A: When choosing non-standard screws, factors such as material compatibility, load requirements, environmental conditions, and installation methods should be carefully evaluated to ensure optimal performance.

Q: Can non-standard screws be retrofitted into existing equipment or structures?

A: Non-standard screws can be retrofitted into existing equipment or structures with proper planning, tools, and expertise to meet specific upgrade or maintenance needs.

Q: How do specialty screws contribute to product innovation?

A: Specialty screws play a crucial role in product innovation by enabling unique designs, improved functionality, and enhanced performance in various industries and applications.

Q: Are there specific tools required for installing non-standard screws?

A: Non-standard screws may require specialized tools or drivers to ensure proper installation and prevent damage to the fasteners or the surrounding components.

Q: What are the environmental considerations when using non-standard screws?

A: Non-standard screws made from eco-friendly materials or coatings can help reduce environmental impact and promote sustainability in manufacturing and construction practices.

Q: Can non-standard screws be recycled or repurposed?

A: Non-standard screws made from recyclable materials can be repurposed or recycled to minimize waste and support sustainable practices in the fastener industry.

Q: How do non-standard screws contribute to enhanced safety and security in critical infrastructure?

A: Non-standard screws with tamper-resistant features or security enhancements play a vital role in safeguarding critical infrastructure, preventing unauthorized access, tampering, or sabotage.

As one of the leading non-standard screws manufacturers and suppliers in China, we warmly welcome you to wholesale non-standard screws for sale here from our factory. All customized products made in China are with high quality and low price. For free sample, contact us now.

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