Are all bolts of the lowest grade now 8.8?
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Are all bolts of the lowest grade now 8.8? Can’t buy any grades below 8.8, such as 6.8 and 5.6?
The lowest grade of bolts available on the market at present is grade 4.8, but lower-grade bolts may be used in certain special cases. As for bolts of grade 6.8 and 5.6, they are still available on the market, but bolts of grade 8.8 are more common and have a wide range of applications. It should be noted that bolts of different grades differ in terms of load-bearing capacity, strength, and operating environment; the choice should be made based on specific requirements. .