What Does 10.9 Mean on a Bolt?
In steel structure construction, one often sees the number ‘10.9’ engraved on the heads of high-strength bolts. This is not merely a random sequence of numbers, but rather a ‘code’…
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Are 10.9 Bolts Stronger than Grade 8.8?
In mechanical fastening, Grade 10.9 and Grade 8.8 bolts are the two most widely used grades, and many people wonder which of the two is stronger. From a technical perspective,…
