Custom Fastener Manufacturer
with Global OEM Expertise

CNRL manufactures ISO and IATF-certified automotive fasteners in our 33,000㎡ facility, with typical lead times of 15-30 days and reliable shipments to markets including the US, Russia, Brazil, and Japan.

Fastener Lines You Can Trust

Bushing Sleeves

Precision-machined from stainless or alloy steel, sizes from M3 to M72.

Bolts

High-strength bolts with multiple surface finishes, tested for tensile and hardness.

Nuts

Standard and custom nuts available in carbon and alloy steel.

Studs

Reliable double-end studs for structural and mechanical applications.

Need Custom Fasteners or a Quick Quote?

We support small batches, rapid sampling, and tailored solutions.

Why Choose CNRL As Your Trusted Supplier

Years

Testing Machines

National-Level Awards

Acre Modern Factory

Tailored Fasteners for Every Sector

1. Automotive

Our fasteners are used in car factories and repair shops for engines, chassis, and body parts, ensuring strong and safe connections.

2. Wind Energy

We provide corrosion-resistant bolts and nuts for wind turbines, designed to withstand harsh weather and last over 5 years.

3. Oil & Gas

Our high-strength fasteners are used in pipelines and drilling rigs, meeting strict quality standards for safety and durability.

4. Mining Machinery

We supply heavy-duty bolts and studs for mining machines, ensuring reliable performance in tough working conditions.

Custom Fastener Specifications

CNRL supports fully customized sizes, materials, and treatments.

Parameter	Specification
Diameter Range	3mm – 30mm
Length Range	6mm – 300mm
Strength Grades	4.8, 8.8, 10.9, 12.9
Materials	Carbon Steel, Stainless Steel, Titanium Alloy, Copper, Iron
Hardness Standards	Rockwell (HR), Vickers (HV), Brinell (HB)
Surface Treatments	Tin Plating, RoHS Nickel, Dacromet, Black Zinc, Chemical/Electrochemical Treatment
Certifications	ISO 9001, CE, FDA, IATF 16949

Custom Fastener Manufacturer CNRL

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Company Overview

Established in 1996, Zhejiang RuiLi (CNRL) Auto Parts Co., Ltd. specializes in manufacturing custom fasteners for the automotive, energy, oil & gas, and mining industries, serving clients across Russia, the USA, Brazil, Italy, Australia, Japan, Germany, and Mexico.

Manufacturing Capabilities

Operating from a 33,000㎡ facility, CNRL boasts multiple production lines equipped with advanced CNC machining, in-house molding, and surface treatment capabilities.

Team & Service Commitment

Our dedicated pre-sales and after-sales teams offer multilingual support and technical assistance, ensuring prompt responses and tailored solutions to meet your specific needs.

CNRL has established strong partnerships with global OEMs, including ZF, TENNECO, and FAW. Our commitment to quality is demonstrated through certifications such as ISO 9001, CE, FDA, and IATF 16949, ensuring our custom fasteners meet international standards. Each product undergoes rigorous quality control processes to guarantee performance and reliability.

1. How long does it take for CNRL to deliver custom fasteners?

With our digital factory and flexible production lines, we typically deliver within 4-6 weeks after receiving your requirements. The exact lead time depends on order complexity. We adjust production plans timely to ensure efficient delivery.

2. How does CNRL ensure the quality of fasteners?

We strictly follow ISO 9001, IATF 16949 quality management systems and perform dual inspections manually and mechanically. Over 30 patented technologies support our product quality assurance.

3. Can I customize fasteners according to special requirements?

Absolutely. We offer full customization on size, material, strength grade, surface treatment, etc. Our expert technical team ensures implementation. Please fill the form to provide your detailed requirements.

4. How can I track the production progress of my order?

We provide updates including photos and videos throughout the process.

5. Do you offer custom packaging options?

Absolutely, we can accommodate your branding and packaging needs.