What we offer
Various Nuts for Different Assembly Requirements
Bolts with integrated flange heads, providing larger bearing surfaces and improved stability for industrial applications.
- Custom Sizes
- Low MOQ
- OEM/ODM
304 stainless steel wing nuts designed for tool-free tightening, providing convenient adjustment and durable fastening performance.
- Custom Sizes
- Low MOQ
- OEM/ODM
Self-locking flange nuts with anti-slip designs, preventing loosening caused by vibration and ensuring secure mechanical connections.
- Custom Sizes
- Low MOQ
- OEM/ODM
Black hex flange nuts with integrated bearing surfaces, providing stable fastening and enhanced appearance for industrial applications.
- Custom Sizes
- Low MOQ
- OEM/ODM
Specialized nuts designed for automotive horn assemblies, providing secure installation and reliable vibration-resistant fastening.
- Custom Sizes
- Low MOQ
- OEM/ODM
Zinc plated rivet nuts designed for sheet metal applications, providing strong threaded connections in thin materials.
- Custom Sizes
- Low MOQ
- OEM/ODM
External tooth lock nuts providing anti-loosening performance, suitable for assemblies requiring vibration resistance and secure fastening.
- Custom Sizes
- Low MOQ
- OEM/ODM
Knurled flange rivet nuts with zinc plating, creating strong threaded inserts for sheet metal and custom assemblies.
- Custom Sizes
- Low MOQ
- OEM/ODM
Hex domed cap nuts providing covered thread protection, improved appearance and reliable fastening for exposed assemblies.
- Custom Sizes
- Low MOQ
- OEM/ODM
Long hex nuts designed for extended threaded connections, offering strong engagement and reliable fastening in mechanical structures.
- Custom Sizes
- Low MOQ
- OEM/ODM
Knurled adjustment studs with external threads, designed for manual adjustment, spacing and secure component positioning.
- Custom Sizes
- Low MOQ
- OEM/ODM
Custom nuts manufactured according to drawings and specifications, supporting unique assembly requirements and non-standard fastening applications.
- Custom Sizes
- Low MOQ
- OEM/ODM
Barrel nuts with stainless steel construction, designed for furniture, panel connections and concealed fastening applications.
- Custom Sizes
- Low MOQ
- OEM/ODM
Hollow hex coupling nuts designed for threaded connections, extension and spacing applications in customized assemblies.
- Custom Sizes
- Low MOQ
- OEM/ODM
Knurled insert nuts designed for plastic molding applications, providing strong embedded threads and reliable component connections.
- Custom Sizes
- Low MOQ
- OEM/ODM
Data
Technical Specifications
| Surface Finishing | Plain, Black Zinc,Blue Zinc,ColorZinc,Chrome Plated,Black Nickel ,White Nickel,Bronze Color,Dacromet, etc. |
| Material | stainless steel，carbon steel，aluminium，iron, brass，titanium, according to your request |
| Measurent Systerm | metric/inch |
| Standard | DIN, GB,ISO,JIS,ANSI,Non-standard |
| Size | M2.5-M12 |
| Length | 2mm-150mm |
| OEM/ODM | Yes |
| Grade | 4.8, 6.8, 8.8, 10.9, 12.9. |
| Packing | PE/PP Bag+carton+pallet,0r OEM as per client’s requirement |
| Port | Zhongshan Port, Shenzhan Port, Guangzhou Port,Xiaolan port, |
Surface Treatment
Surface Treatment Options
Available in blue zinc, black zinc, clear zinc, yellow zinc and colored zinc finishes. Coating thickness and corrosion resistance can be customized, with salt spray performance starting from 48 hours.
White nickel, bright nickel and black nickel finishes are available for improved appearance, wear resistance and corrosion protection.
Provides high corrosion resistance, good heat resistance and low risk of hydrogen embrittlement. Suitable for automotive, outdoor and high-strength fasteners.
Black oxide, chrome plating, zinc-nickel alloy coating and thread-locking treatments are available according to application needs.
OUR MANUFACTURING STRENGTH
More Fastener Options, Backed by Reliable Production
Categories：Thousands of fastener product varieties cater to all your requirements.
We have over 80 imported machines from Taiwan. including multi-station machines, riveting machines, threading machines, and tooth-casting machines.
Our product performance ranges from class 4.8 to 12.9, with a diameter from 2mm-16mm and a length ranging from 2mm-200mm.
Why Choose Us
Core Manufacturing & Service Advantages
Stable production, flexible customization and clear order follow-up help you control quality, cost and delivery.
Over 30 years of manufacturing experience and technical knowledge, with practical guidance for product development and production.
More than 80 Taiwan-imported production machines support a monthly capacity of over 150 tons.
Factory advantage: 10,000㎡ self-owned factory, direct manufacturer, cost & lead time controllable.
Quality is controlled from raw material inspection and production to packing and shipment.
6 years of export experience, supporting quotations, samples, documentation, customs clearance and shipping.
We have served over 2,000 companies, including more than 50 customers who have worked with us for over 20 years.
We can support OEM/ODM customized development, new product trial production.
Whole-process order follow-up: update production schedule & QC inspection photos regularly, guarantee on-time delivery and inform any unexpected issues timely. Products with quality issues can be returned and replaced as needed.
Large quantity orders can be customized with packaging and logos as per requirements.
Precision Dimensional Control
We manufacture strictly according to approved drawings and control tolerances throughout production, ensuring consistent dimensions and reliable assembly. For applicable parts, tolerances can be controlled within ±0.05 mm.
QUALITY CONTROL
6 Inspections at Every Critical Production Stage
Our inspection equipment includes torque testers, hardness testers, 2D vision measuring systems, optical sorting machines and salt spray test chambers. Quality checks run throughout production to ensure stable dimensions, reliable performance and consistent batch quality.
Automatic Vision Measurement
Hardness Testing
Torque Testing
Optical Sorting
Salt Spray Testing
Manual Inspection
QUALITY & COMPLIANCE
Certificates and Test Reports for Buyer Review
Relevant quality and compliance documents can be provided based on the product, material, surface finish and destination market.
ISO 9001 Quality Management System
EN 71-3 Material Safety Testing
REACH Chemical Compliance
RoHS Restricted Substance Compliance
Client Testimonial
What that say about Justwintec
Other Questions
FAQs
Yes. We manufacture custom screws, rivets, bolts, nuts, pins and special fasteners based on your drawing or sample.
Small trial orders are available. MOQ depends on the material, size, process and tooling requirements.
Mold development normally takes 7–15 working days.
Minor mold adjustments for sample improvement can usually be made without an additional charge. Major structural changes will be quoted separately.
Common materials include:
- Carbon steel
- 40Cr alloy steel
- Stainless steel SS304 and SS316
- Stainless steel A2 and A4
- Brass
- Aluminum
- Titanium
Other materials can be discussed according to your application.
Available surface treatments include:
- Zinc plating
- Black oxide
- Dacromet
- Nickel plating
- Chrome plating
- Zinc-nickel alloy coating
For zinc-plated products, salt spray resistance can be customized from approximately 48 to 500 hours depending on the coating system and project requirements.
Standard items in stock normally ship within 3–7 days.
Custom molded products normally require 15–30 days after sample confirmation.
Yes. We support OEM-branded packaging, custom logos and neutral export packaging.
Please provide:
- Drawing or sample
- Material
- Surface treatment
- Order quantity
- Required tolerance
- Target standard
The more complete the information, the faster we can provide an accurate quotation.
Yes. We can assist with export documentation, customs clearance and worldwide FCL or LCL shipment arrangements.
Send us a message
Feel Free to Reach Out for Further Details.
Looking for reliable fastener solutions? Justwintec is here to support your project with professional service, fast response, and stable factory supply.
