Maker
Most folk just call me; Orange Joe
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What if the bolt was holding something that does get impacted?Tell me when a 12.9 bolt would break as opposed to a 8.8? Bolts aren't designed to be hit with a hammer to see how far they will bend. It's the strength of the bolt = when tightened up what forces can be applied before it breaks. The working limit for a 12.9 will last more or less for ever, a 8.8 will have gone bye bye long before.