Frequently Asked Questions (FAQs) | Zhejiang Zhongrui Auto Parts Based on our 38 years of experience as an IATF16949 certified automotive fastener manufacturer, here are answers to common questions from clients like OEMs, Tier 1s, Tier 2s, and Distributors. I.Common Questions Before Procurement Q1: ...

We also invite you to: Visit Our Booth at CAPAFAIR Ningbo 2025:  Meet us in person at Booth H5-234, August 13-15, 2025, Ningbo International Exhibition Center.  https://www.zjzrqc.com/news/high-strength-automotive-fasteners-meet-manufacturer-zhejiang-zhongrui-directly-at-capafair-ningbo-2025.html...

We also invite you to: Visit Our Booth at CAPAFAIR Ningbo 2025:  Meet us in person at Booth H5-234, August 13-15, 2025, Ningbo International Exhibition Center.  https://www.zjzrqc.com/news/high-strength-automotive-fasteners-meet-manufacturer-zhejiang-zhongrui-directly-at-capafair-ningbo-2025.htm...

Flanged hexagon bolts are critical fasteners widely used across numerous industries, providing a larger bearing surface under the head compared to standard hexagon bolts, thus eliminating the need for a separate washer in many applications. Two common standards governing these fasteners are the Germ...

Automotive spring washers are critical components in high-vibration assemblies, helping to maintain consistent clamping force under dynamic conditions. But like any mechanical part exposed to stress and movement, they face the persistent challenge of fatigue. Fatigue failure doesn't happen overnight...

In the automotive industry, where every component must perform under demanding conditions, the surface treatment of automotive screw washers is more than just a finishing touch—it plays a vital role in determining the part’s longevity, corrosion resistance, and overall performance. Manufacturers and...

When it comes to automotive applications, the smallest components can have the biggest impact on safety and performance. One of the most critical factors for fasteners, especially bolts, is their strength grade or class. Making the wrong choice here can lead to premature failure, compromise structu...

At Zhejiang Zhongrui Auto Parts, a leading  automotive fastener manufacturer  specializing in  custom solutions , we understand that the demands of EV construction often require fasteners that go beyond standard specifications. Why Standard Fasteners Don't Always Cut It for EVs The u...

Table of Contents What Exactly Are Automotive Fasteners? Why Choosing the Right Automotive Fastener Matters Common Automotive Fastener Types & Zhejiang Zhongrui's Expertise Nuts: Securing the Joint Bolts: The Foundation of Connections Washers: Load Distribution and Protection ...

Table of Contents Understanding Fastener Thread Size Why Thread Size Matters for Performance and Compatibility Our Comprehensive Range of Thread Sizes Metric Thread Sizes Imperial (Inch) Thread Sizes Beyond the Size: Quality, Standards, and Expertise Finding the Right Thread ...

Understanding ISO Standard Fasteners ISO standards cover a vast array of fastener types, specifying their dimensions, tolerances, materials, mechanical properties, and testing methods. For manufacturers and engineers operating in the global market, sourcing fasteners compliant with ISO standards sim...

At Zhejiang Zhongrui Auto Parts, we understand that fasteners are the backbone of mechanical and engineering systems, playing a critical role in ensuring the reliability and performance of countless applications, especially within the automotive industry. We specialize in manufacturing fasteners acc...