china flat washer size guide

A Comprehensive Guide to Flat Washer Sizes in China

Flat washers are essential components in various applications, from construction to machinery maintenance. Understanding the sizes and specifications of flat washers is crucial for ensuring proper assembly and functionality. In this guide, we will explore the different sizes of flat washers available in China, helping you make an informed choice for your projects.

What is a Flat Washer?

A flat washer is a thin, disc-shaped piece of material, typically made of metal or plastic, used to distribute the load of a threaded fastener, like a screw or bolt. By increasing the surface area under the head of the fastener, flat washers help prevent damage to the surface being fastened and reduce the likelihood of loosening due to vibration.

In China, flat washers are standardized based on dimensions such as outer diameter (OD), inner diameter (ID), and thickness. The most commonly referenced standards include the ISO and GB (Guobiao) standards. Flat washers can come in various sizes, and the selection usually depends on the size of the bolt or screw they will accompany.

1. Metric Sizes The metric system is widely used in China. Common sizes include - ID 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, etc. - OD 6mm, 8mm, 10mm, 14mm, 16mm, 20mm, 24mm, etc. - Thickness Usually ranges from 0.5mm to 3mm, depending on the specific application.

2. Imperial Sizes While the metric system prevails, imperial sizes are also available for specific applications, especially in industries aligned with international standards. Common sizes include - ID 1/8”, 1/4”, 3/8”, 1/2”, etc. - OD 1/4”, 1/2”, 3/4”, 1”, etc.

Material Choices

The material used for flat washers can significantly influence their performance and durability. Common materials include - Steel Often galvanized or stainless to resist corrosion. - Brass Offers excellent corrosion resistance and is non-magnetic. - Plastic Ideal for applications requiring electrical insulation.

Conclusion

Choosing the right flat washer size is essential for achieving optimal performance in your applications. Whether you are working within the construction industry or handling machinery repairs, understanding the dimensions and materials of flat washers can greatly impact the efficiency and longevity of your projects. By referring to this size guide, you can ensure your assemblies are strong, secure, and reliable.