Screws Manufacturer

Justwintec is a screw manufacturer in China, supplying thousands of screw and rivet specifications and OEM/ODM custom fasteners based on drawings or samples.

What we offer

Thousands of Screw Types for Different Assembly Needs

We manufacture standard and custom screws in different materials, strengths, threads, sizes and surface finishes. OEM/ODM production is available based on your drawings, samples and application requirements.

01. Machine Screws By Head Type

Precision screws with different head designs, providing reliable fastening solutions for machinery, equipment and industrial assemblies.

Hex Socket Screws

Compact, high-strength screws tightened with an Allen key, suitable for machinery and precision assemblies.

Pre-Assembled Combination Screws

Pre-assembled screws with washers, designed to simplify installation and improve fastening efficiency.

Flat Head Slotted Stainless Steel Screws

Stainless steel flat head screws with slotted drives, suitable for applications requiring corrosion resistance and neat finishes.

Flange Hex Head Phillips Screws With Washer Anti-Slip Machine Bolt

Flange screws with integrated washers, providing larger bearing surfaces, anti-loosening performance and reliable fastening for machinery assemblies.

A2-70 Stainless Steel Knurled Socket Head Cap Screws Anti-Slip Hex Allen Bolt

Stainless steel socket head cap screws with knurled designs, offering corrosion resistance, improved grip and stable fastening performance.

Black Oxide Large Pan Head Phillips Machine Screws

Machine screws with black oxide finish and large pan heads, providing enhanced appearance and reliable fastening for industrial applications.

Countersunk Phillips Nylon Patch Locking Screw

Countersunk screws with nylon locking patches, designed to prevent loosening under vibration and provide secure assembly performance.

Shoulder Screws

Precision shoulder screws with stepped structures, designed for positioning, spacing and controlled movement in mechanical assemblies.

Flat Head Phillips Machine Screws

Flat head Phillips screws designed for flush installation, providing a clean appearance and reliable fastening performance.

12.9 Grade Screws

High-strength screws for machinery and equipment requiring reliable fastening performance.

10.9 Grade Button Head Socket Screws Allen Drive

High-strength button head socket screws with Allen drives, offering reliable torque control and secure fastening for mechanical assemblies.

Pan Head Phillips Stainless Steel Screws

Stainless steel Phillips screws with pan heads, providing corrosion resistance, smooth appearance and dependable fastening performance.

02. Self-Tapping Screws

Self-tapping screws designed for direct installation into metal, plastic, wood and other materials without pre-threading.

Pan Head Torx Screws

Torx drive screws with pan heads, providing better grip, reduced cam-out and stable assembly performance.

Black Phosphated Phillips Countersunk Drywall Screws

Countersunk drywall screws with black phosphated coating, offering corrosion resistance and secure fastening for boards and construction materials.

Countersunk Hex Wood Screw Furniture Confirmat Screw

Furniture screws with countersunk hex heads, designed for strong connections in wood panels, cabinets and furniture assemblies.

Hex Flange Self Drilling Screws With Rubber Washer for Roof

Self-drilling screws with hex flange heads and rubber washers, providing waterproof sealing and secure roofing installation.

Hex Head Wood Screws

Hex head wood screws designed for strong connections in timber structures, offering easy installation and reliable holding strength.

Hex Socket Cap Head Self Tapping Screws

Self-tapping screws with hex socket cap heads, designed for direct installation into metal, plastic and other materials.

Yellow Zinc Phillips Countersunk Wood Screws Self Tapping Fasteners

Yellow zinc coated wood screws with countersunk Phillips heads, offering corrosion resistance and smooth flush installation.

03. Special Structure Screws

Specially designed screws with unique structures for positioning, adjustment and customized assembly requirements.

Step Screws

Custom stepped screws with different diameters for positioning, spacing and moving joints.

Motor Mounting Screws

Custom screws for motors, electrical equipment and mechanical assemblies, with stable dimensions and thread fit.

Serrated Screws

Serrated designs increase grip and help reduce loosening under vibration or repeated movement.

Phillips Flat Head Screws

Flat head Phillips screws designed for flush installation, providing a smooth surface finish and reliable fastening performance.

Socket Head Long Cap Screws

Long socket head cap screws offering high strength, precise tightening and reliable connections for machinery and industrial assemblies.

Slotted Shoulder Screws

Shoulder screws with slotted heads, providing accurate positioning, spacing control and smooth movement in mechanical applications.

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,

Screw Drive Types

Various Screw Drive Types for Different Assembly Needs

We provide various screw 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.

Screw Head Types

Multiple Screw Head Designs for Customized Applications

Different screw 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 screw 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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