- Industrial Grade Fastener Solutions
Professional Screw Manufacturer
- Custom Solutions for Specific Requirements
- Free Samples, Low MOQ & Bulk Pricing
- Global Coverage Across 20+ Countries
Screws - Standard & Custom Assortment
From standard screws to custom fasteners, from micro precision parts to extra-long structures — We customize every screw according to your design.
Screw Types: Cross-head Screws / Slotted Screws / Hex Socket Screws / Torx Screws / Self-tapping Screws
Countersunk Head Screws / Pan Head Screws / Wood Screws / Self-drilling Screws
Material: Stainless Steel / Brass / Iron / Aluminum / Titanium
Fastener Standard System
Global fastener standards fall into two non‑interchangeable systems: metric and imperial (inch‑based). ISO and EN push metric‑system harmonization, while US standards combine ANSI and multiple association specifications including ASTM, ASME, SAE and IFI‑8.
The fastener user must distinguish international, regional, national and association‑level documents to guarantee part interchangeability.
| Standard Level | Representative Codes | Main Features |
|---|---|---|
| International | ISO | Global metric‑system baseline for fasteners |
| Regional (Europe) | EN | EU harmonized standards, widely adopted by European nations |
| National | DIN, BS, ANSI, JIS, GB | Local adoption / modified versions of ISO‑EN documents |
| US Association | ASTM, ASME, SAE, IFI‑8 | Inch‑system core specifications; IFI‑8 is US inch‑fastener manual |
Industrial-Grade Screws for Bulk supply
- Customizable Options: Head / Drive / Thread / Material / Finish / Process
- Size: Manufactured exactly per drawings for unique assembly needs
- MOQ: Small-batch customization available
- Design: Supports proprietary drive/thread designs with authorization
- Material: Gr1 / Gr2 / Gr5
- Strength: HRC 24-28 / HRC 32-36
- Finish: Anodizing / Mcro-arc oxidation / Natural cleaning / Electrophoresis
- Weight: Lightweight yet strong
- Anti-corrosion: Excellent corrosion resistance
- Safety: Biocompatible and non-toxic
- Material: 1100 / 6061 / 6063 / 7075
- Finish: Anodizing / Hard anodizing / Sandblasting / Natural color
- Weight: Extremely lightweight
- Conductivity: Good electrical and thermal conductivity
- Anti-corrosion: Excellent resistance to atmospheric corrosion
- Material: SUS304, SUS316, 316L, 410, 430
- Surface Treatment: Passivation / Polishing / Mirror Finish / Sandblasting / Electrophoresis / QPQ / Zinc-nickel Alloy
- Anti-corrosion: Excellent corrosion resistance
- Durability: High Strength , Durable and Aesthetic
- Material: Carbon Steel / Stainless Steel / Alloy steel, etc.
- Process: Molding / Cold Heading / Turning
- Features: Length up to several hundred millimeters, suitable for deep-hole connections
- Hardness: Hardenable to grade 8.8 and above
- Thread Type: A, B, BT, PT
- Material: Carbon Steel / Stainless Steel / Copper / Aluminum / Alloy, etc.
- Function: Self-drilling function, no pre-drilling required
- Application: Various thread types for different base materials
Fully Customizable
Custom-Fit Screws for Your Unique Application
- Material: Carbon Steel / Stainless Steel / Alloy Steel / Iron / Aluminum / Brass / Titanium
- Surface Treatment: Anodizing / Polishing / Zinc / Black Oxide / Phosphating / Passivation
- Screw Types: Cross-head Screws / Slotted Screws / Hex Socket Screws / Torx Screws / Self-tapping Screws / Countersunk Head Screws / Pan Head Screws / Wood Screws / Self-drilling Screws
Common Screw Head Styles & Thread Types
Different screw head styles and thread types are designed to meet various special usage environments and technical requirements. Diverse head configurations deliver unique installation ways and load-bearing surfaces for confined spaces, flush mounting and high-torque fastening scenarios. Different thread patterns directly affect clamping force, anti-vibration performance and material adaptability.
Discover Our Technology Expertise
Powered by advanced production machinery, we uphold stringent manufacturing standards, delivering high‑performance fastener solutions built for the most demanding environments.
Thread Rolling Machine
High-efficiency thread rolling machine — for stronger and more precise threads.
Single-die Machine
Precision single-die machine — built for efficient standard screws production.
Multi-Station Machine
Multi-station machine — made for complex and custom screws.
Polishing Machine
An automated device used to improve the surface smoothness and appearance of screws.
Salt Spray Testing Machine
A laboratory device used to evaluate the corrosion resistance of metals and coatings.
Brinell Hardness Tester
A Brinell hardness tester for screws measures the hardness of materials to ensure strength and durability.
Advanced Quality Monitoring System
We execute real‑time dimensional verification, material composition validation and automated defect screening throughout every production phase. Full‑batch traceability records capture inspection data for audit compliance.
Screw Go/No-Go Gauge
A measuring tool used to verify whether a screw thread meets standard dimensions. The “Go” gauge checks if the thread is within tolerance, while the “No-Go” gauge ensures it is not oversized or undersized.
Hardness Test
Used to measure the material hardness of screws, evaluating strength and wear resistance to ensure compliance with design and application standards
Screw Spectrum Test
Uses spectral analysis to determine the chemical composition of screw materials, ensuring they meet standards and customer specifications.
Plating Test
Used to measure the thickness, adhesion, and uniformity of the screw’s surface coating to ensure the plating meets quality standards.
Screw Fatigue Test
Used to evaluate the durability of screws under repeated loading or long-term stress, testing their fatigue strength and service life.
Salt Spray Test
Simulates salt spray environments to evaluate the corrosion resistance of screw surfaces and the durability of their coatings.
Packaging and Shipment
The goods are packed in transparent plastic bags and sturdy cartons, and transported on special export wooden pallets. This packaging is suitable for land, sea and air transportation, ensuring the safe and timely delivery of goods to customers.
About Us
HK TONGLIN INTERNATIONAL LIMITED, branded as TONGLIN and also known as HKTL Fastener, specializes in fastener processing and CNC machined parts. The company has operated its own manufacturing facility in mainland China since 2011.
Equipped with advanced production machinery (including multi-station cold heading machines, thread rolling machines, and custom mold equipment) and a full range of testing instruments (torque testers, hardness testers, salt spray and hydrogen embrittlement testers), we ensure stable quality, precise tolerance control, and excellent corrosion resistance for every product.
Our products have been widly used in home appliance, furniture, mechanical equipment, electronics, construction, recreational facilities, medical devices, auto parts, aero industry etc. The products were exported to Europe, Africa, Middle East, Asia and other areas.
Our vision is to offer quality products and the most suitable solution to customers at a reasonable cost. Finally become a long-term partner of clients.
Authoritative certification
From raw material sourcing to finished product delivery, every stage is under strict quality control.
These certifications are not only a testament to our technical capability, but also a firm commitment to providing you with stable, reliable, and high-standard fastening solutions.
Real feedback
What our clients are saying.
A Customer in Africa
A Client in the Middle East
A Customer in Asia
A Client in Europe
Frequently Asked Questions
Have you ever encountered these problems before?
We can provide you with perfect answers to problems that your supplier can not solve.
Q: Will there be unstable quality and significant differences among batches?
A: We strictly implement the ISO system, conduct full process quality inspection and sampling, and provide a third-party test report according to the customer’s requirements; Ensure batch consistency.
Q: Is the material purity or performance up to standard?
A: We use quality raw materials to process products, material certification and testing reports can be issued.
Q: Will the delivery cycle be uncertain?
A: We have adequate equipment and production capacity, improved production processes, flexible inventory, and support for small batch and customized fast shipments.
Q: Is there a balance between low costs and transparent cooperation?
A: We provide a tiered pricing mechanism, support OEM/ODM, emphasize high cost-effectiveness and long-term cooperation stability.
Q: Will there be poor communication or insufficient after-sales service?
A: We support English technical communication, able to understand overseas customer drawings and standards; Provide professional after-sales service.
Q: Are there any compatibility issues?
A: We can provide customized solutions for different fields such as aviation, medical, outdoor, electronics, etc.
We offer 24/7 consulting services and free samples.
With the advanced equipment and 15+ years of industry experience, we could meet your unique custom needs with an affordable cost.
- +86 136 2219 2628
- Mon - Fri: 9:00am - 6:00pm
- No.16 Shing Yip Street Kowloon Hong Kong
Consult our technical team
We provide comprehensive fastener solutions, not just products. Our engineers ensure your fastening strategy is optimized for safety and cost-efficiency.
As a leading source factory, we deliver high-efficiency industrial fastener solutions designed to optimize performance, ensure durability, and improve your supply chain.
Products
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Contact
+86 13622192628
info@hktl-fastener.com
No.16 Shing Yip Street Kowloon Hong Kong
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