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@gbj_tester
A small number of bolts is normal. Illustrated is just the first thing I found a picture of, an A-10 Thunderbolt II, but IIRC the whole weight of the fuselage including up to 30 tons of weapon load hangs from the wing of a B-52 on just 4 bolts.
As you have to prove by computation that every bolt, and the structures on both sides of the joint which will transfer the fastener load, will never be overloaded in service, it's much easier to use a small number of large bolts rather than a large number of small ones.
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