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Chevy uses the flange bolt and has for years. I don't see an issue with torquing at all
If the friction is the same in both situations, the flange headed
fastener would require a higher torque to achieve the same preload. This is due
to the effective friction diameter of the head increasing when a flange headed
fastener is used.
I hope that this helps
Bill Eccles PhD
Bolt Science www.boltscience.com
411503 Fax. +44 1257 411650
upon the specifics; approximately in the order of 10% typically.
(I would like to have edited this and put all in one response, but can no longer do that for some reason)