Bolts Manufacturer

Justwintec is a bolts manufacturer in China, supplying standard and custom bolts for machinery, equipment, automotive components and industrial assemblies. We provide various bolt designs, materials, sizes and surface treatments, with OEM/ODM support based on drawings, samples and specific application requirements.

What we offer

Various Bolts for Different Assembly Requirements

We manufacture bolts with different head designs, thread structures, materials and finishes to meet various fastening requirements. From standard bolts to customized solutions, we support reliable production for industrial, automotive and equipment applications.

Flange Bolts

Bolts with integrated flange heads, providing larger bearing surfaces and improved stability for industrial applications.

Carriage Bolts

Round-head bolts with square neck designs to prevent rotation, suitable for furniture, structures and outdoor assemblies.

Hex Head Bolts

Hex head bolts designed for wrench tightening, offering strong connections for machinery and structural applications.

Stainless Steel Triangular Eye Bolts Delta Ring Lifting Screw For Light Hoisting

Stainless steel eye bolts with triangular rings, designed for light lifting, hanging and secure fastening applications.

Silver Chicago Screws Post and Binding Fasteners For Book Album Leather Assembly

Post and binding screws designed for books, albums and leather assemblies, providing adjustable connections and decorative fastening solutions.

304SS Eye Bolts and Nut

304 stainless steel eye bolts with nuts, offering corrosion resistance and reliable fastening for lifting and mounting applications.

A2-70SS T Slot Bolts

A2-70 stainless steel T slot bolts designed for profile systems, providing secure positioning and strong mechanical connections.

Butterfly Wing Head Thumb Screw

Wing head thumb screws designed for tool-free tightening, offering convenient adjustment and quick installation for various assemblies.

Expansion Bolt Wedge Anchor Bolt

Wedge anchor bolts providing strong expansion fixing in concrete, suitable for construction and heavy-duty mounting applications.

T Bolts

T bolts designed for slot mounting systems, enabling flexible positioning and reliable fastening in machinery and structural assemblies.

Anchor Bolt

Anchor bolts designed for secure structural fixing, providing stable connections for equipment installation and construction projects.

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,

Blots Drive Types

Various Blot Drive Types for Different Assembly Needs

We provide various blot drive designs to match different tools, torque requirements and assembly conditions, including standard and customized options.

Available Drive Types:

Phillips Drive
Common cross-shaped drive design, suitable for general assembly and widely used in industrial and commercial products.

Slotted Drive
Traditional straight-slot design for simple installation and maintenance applications.

Torx Drive
Star-shaped drive providing better torque transfer, reduced cam-out and improved fastening stability.

Hex Socket Drive
Internal hex drive designed for high torque applications with clean appearance and reliable tightening performance.

Square Drive
Square recess design offering improved grip and reduced slipping during installation.

Tamper-Resistant Drive
Special drive structures designed for applications requiring additional security and controlled access.

Blot Head Types

Multiple Blot Head Designs for Customized Applications

Different blot head designs provide different installation finishes, load distribution and appearance requirements. We support standard and customized head structures.

Available Head Types:

Flat Head
Designed for flush installation, allowing the blot surface to sit level with the material.

Pan Head
A widely used rounded head design providing a larger bearing surface and reliable fastening strength.

Round Head
Classic rounded profile suitable for applications requiring smooth appearance and stable fastening.

Button Head
Low-profile rounded head offering a clean appearance and sufficient clamping area.

Truss Head
Large diameter head design providing increased surface contact and better load distribution.

Flange Head
Integrated flange increases bearing area and helps prevent loosening during assembly.

Hex Head
External hexagonal head designed for wrench tightening and high-strength fastening applications.

Surface Treatment

Surface Treatment Options

We offer zinc plating, nickel plating, Dacromet, zinc-flake coating, black oxide, chrome plating, phosphating, stainless steel passivation, electropolishing and aluminum anodizing.

Functional treatments such as thread-locking patches, sealing, lubrication and anti-rust coatings are also available. Coating thickness, color and salt spray performance can be customized according to your application requirements.

Zinc Plating

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.

Nickel Plating

White nickel, bright nickel and black nickel finishes are available for improved appearance, wear resistance and corrosion protection.

Dacromet Coating

Provides high corrosion resistance, good heat resistance and low risk of hydrogen embrittlement. Suitable for automotive, outdoor and high-strength fasteners.

Other Surface Treatments

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

From thousands of standard and custom fasteners to 80+ production machines, we support different sizes, strength grades and OEM/ODM requirements with stable capacity and flexible supply.

Product Categories

Categories：Thousands of fastener product varieties cater to all your requirements.

Manufacturing Facilities

We have over 80 imported machines from Taiwan. including multi-station machines, riveting machines, threading machines, and tooth-casting machines.

Unlimited Product Range

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.

Professional Expertise

Over 30 years of manufacturing experience and technical knowledge, with practical guidance for product development and production.

Stable Delivery

More than 80 Taiwan-imported production machines support a monthly capacity of over 150 tons.

10,000+ m² Self-Owned Factory

Factory advantage: 10,000㎡ self-owned factory, direct manufacturer, cost & lead time controllable.

Full-Process Quality Control

Quality is controlled from raw material inspection and production to packing and shipment.

One-Stop Export Service

6 years of export experience, supporting quotations, samples, documentation, customs clearance and shipping.

Long-Term Cooperation

We have served over 2,000 companies, including more than 50 customers who have worked with us for over 20 years.

OEM/ODM Support

We can support OEM/ODM customized development, new product trial production.

Whole-Process Order Follow-Up

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.

Custom Packaging

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.

Years of Experiences

0 +

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

The vision measuring system checks key dimensions, tolerances and complex profiles with high accuracy.

Hardness Testing

Rockwell and Vickers hardness testers verify material hardness and heat-treatment performance.

Torque Testing

Torque testing checks tightening strength, thread performance and fastening reliability.

Optical Sorting

Automatic optical sorting detects dimensional defects, damaged threads and abnormal product shapes.

Salt Spray Testing

Salt spray testing verifies coating quality and corrosion resistance according to order requirements.

Manual Inspection

Experienced inspectors check dimensions, threads, appearance and surface defects before packing and shipment.

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

Supports standardized production management, quality inspection and process control.

EN 71-3 Material Safety Testing

Available for applicable fasteners and materials used in children-related products.

REACH Chemical Compliance

Testing documents can be provided for applicable materials and surface finishes.

RoHS Restricted Substance Compliance

Supports buyer reviews for products requiring controlled hazardous substance levels.

MEET US IN PERSON

Industry Exhibitions and Buyer Meetings

We attend industry exhibitions to present our products, meet global buyers and discuss drawings, samples and supply requirements face to face.

Client Testimonial

What that say about Justwintec

Hear what global buyers say about our product quality, delivery reliability and custom fastener support.

"Exellent communication and help from Coco. Product arrived promptly and is exactly what we ordered. It was well packaged and labelled. Thank you! "

"Good quality, exceeding expectations"

"Perfect for demanding projects，good product and service."

FAQs

Can you manufacture non-standard or special-shaped fasteners?

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.

How long does mold development take?

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.

What materials are available?

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.

What surface treatments are available?

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.

What is the normal delivery time?

Standard items in stock normally ship within 3–7 days.

Custom molded products normally require 15–30 days after sample confirmation.

Do you support OEM branding and neutral packaging?

Yes. We support OEM-branded packaging, custom logos and neutral export packaging.

What information is needed for a quotation?

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.

Can you assist with customs clearance and shipping?

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.

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