News Center

Strength rating is used to describe the maximum load and stress that a fastener can withstand. According to the international standard ISO 898, the strength level of fasteners is generally expressed in numbers, and the higher the number represents the higher strength. There are eight major strength levels, 4.6, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, and 14.9.

Among them, 4.6 and 5.6 are general grade fasteners, which are suitable for some scenes that do not require high strength, such as home decoration and general mechanical equipment. Fasteners in grades 6.8 and 8.8 have a certain high strength and are suitable for scenarios that require greater load and stress, such as automotive manufacturing and large mechanical equipment.

Fasteners in grades 9.8 and 10.9 are high strength grades and are widely used in scenarios that require extremely high loads and stresses, such as bridge construction and heavy machinery equipment. Fasteners in grades 12.9 and 14.9 are the highest strength grades and are suitable for some special requirements, such as aerospace and nuclear power equipment.

How to choose the right strength level

The selection of the appropriate fastener strength level needs to consider many factors, including application scenarios, working environment and load requirements. Here are some suggestions for selecting a fastener strength class:

- For general non-safety related applications, Class 4.6 fasteners are sufficient.