Grade 5 bolts have 3 marks identifying on the head
This is further explained below.
What are Grade 5 bolts?
Generally, When looking for the correct bolt, it is essential to check that the grades of the bolts that are currently being used are compatible with one another.
There is no difference between Grade 5 Bolts and Metric.
8 Bolts. The presence of three marks on the head of a Grade 5 bolt is often all that is required for successfully identifying the bolt.
In conclusion, The head of a grade 5 bolt will have three distinguishing markings on it.
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