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...

Real pics taken from shelves in our warehouse: GBT16674 DIN6291 hex flange bolts with diverse specs Product Name Spec Material Grade Surface Treatment Film Thickness Salt Spray Time Stock Quantity (K) Packaging (K/Box) DIN 6921 GB/T16674.1 Hex Flange Bolt M16*90-12.9 35CrMo 12.9 Dacromet ≥8μm...

At Zhejiang Zhongrui Auto Parts, our unwavering commitment to quality begins long before a fastener takes shape. It starts with the raw material – the very foundation of the high strength automotive fasteners that are critical for vehicle safety and performance. We understand that the chemical compo...

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...

Check out PDF for our custom auto parts | Zhejiang Zhongrui Auto Parts Meet a few members of our dedicated team, ready to help you:Coco Chen, Director of Business Development: coco.chen@zjzrap.comFreddie Xiao, Account Manager: freddie.xiao@zjzrap.comBrian Xu, Technical Sales Assistant: brian.xu@z...