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Standard specification for screws

Gb-national standard is one of the many standards in our country, in addition to industry standards, professional standards and departmental standards. National standards are divided into GB (mandatory standards) and GB/T (recommended standards) and GBn (national internal standards). What we usually see like GB30, GB5783 and so on are mandatory standards.

2023

Cause analysis and solution of GO failure

(The standard allows rotation with a certain force, and if it can pass, the batch of products is qualified. The content can refer to the torque specified in GB/T 5779.1-2000, specifically see the following table)

2023

Stainless steel fasteners for high temperature operating environments

When the normal working temperature of the heat exchanger reaches 1000°F(about 283°C), the bolts made of stainless steel are rusty! Why is that? It turns out that at higher temperatures, thermal cycling makes some stainless steels non-stainless. Therefore, the selection of fastener materials must be careful to avoid accidents.

2023

Screw material knowledge

Carbon steel. We distinguish low carbon steel, medium carbon steel and high carbon steel and alloy steel by the content of carbon in carbon steel material.

2023

What are the strength levels of fasteners?

As we all know, the strength of austenitic stainless steel 304 grade 316 fasteners is distinguished by 70 or 80 grades (such as A2-70, A4-70 or A2-80,A4-80), many people

2023

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