Screw
Custom Industrial Screws For Demanding Applications
From self drilling screws to drywall and machine screws, DongChao delivers consistent quality, flexible customization, and reliable bulk supply.
Full Range of Screws
Self Drilling Screws, Self Tapping Screws, Drywall Screws, Machine Screws, Timber Screws — complete solutions for multiple industries.
Certified Quality Standards
Manufactured according to DIN, ISO, and ANSI standards with strict quality control across every production batch.
Material & Surface Flexibility
Carbon steel, stainless steel, alloy steel with zinc plating, black oxide, galvanization and more options available.
OEM & Custom Manufacturing
Custom sizes, thread types, head styles, coatings, and packaging tailored to your specific project requirements.
Wide Array Of Screws
We provide a full range of industrial screws designed for different materials and applications.
Designed for metal-to-metal fastening without pre-drilling, ideal for roofing and steel structure applications.
Engineered to create threads in pre-drilled holes, widely used in metal and plastic assembly.
Optimized for fastening drywall to wood or metal studs with strong holding performance.
Precision screws for machinery, equipment, and industrial assembly applications.
Product Categories
Latest Products
Technical Specifications & Standards
| Standards | DIN, ISO, ANSI, ASTM |
| Diameter Range | M2 – M12 / #4 – 1/2” |
| Length Range | Customizable |
| Strength Grades | 4.8 / 8.8 / 10.9 / 12.9 |
| Material Options | Carbon Steel Stainless Steel (304 / 316) Alloy Steel |
| Surface Treatment | Zinc Plated Black Oxide Hot Dip Galvanized (HDG) Ruspert Coating |
Application-Based Solutions
Custom Screws for Your Application
We support OEM and custom screws for wholesale buyers.
Non-standard dimensions & thread types
Produced according to your drawings or samples, including metric and imperial specifications.
Special coatings for harsh environments
Zinc plating, black oxide, hot-dip galvanizing, or other finishes for corrosion resistance.
Custom head styles and drive types
Options such as hex, pan, countersunk, Phillips, Torx, and more.
Drawing-based production
Drawing-based production – Technical review before production to ensure accuracy, fit, and consistency.
Our quality system ensures every batch meets required standards:
Incoming material inspection
In-process quality control (IPQC)
Final inspection before shipment
Testing capabilities include:
Hardness testing
Tensile strength testing
Salt spray corrosion testing
Certifications:
ISO 9001 Quality Management
RoHS compliant (if required)
FAQ
Q: What is the difference between self drilling and self tapping screws?
A: Self drilling screws have a drill point and can penetrate metal directly, while self tapping screws require a pre-drilled hole.
Q: Which screw is best for outdoor use?
A: Stainless steel or hot-dip galvanized screws are recommended for corrosion resistance.
Q: Can you produce custom screws based on drawings?
A: Yes, we support OEM manufacturing with drawings or samples.
Q: What is your typical lead time?
A: Standard products: 15–30 days
Custom orders: depending on complexity
As one of the most professional screw manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to wholesale bulk high quality screw in stock here and get pricelist from our factory. Customized orders are welcome.
