On May 20, 6:20*am, "David L. Martel" wrote:
Jim,

*carriage bolt* heads don't have anything to grab onto.

* *Sure they do. You can usually get the vice-grips to grab onto the edge of
the bolt head. And of course, if there is a threaded end sticking out of the
nut you can grab there.

Dave M.

Every carriage bolt in wood I have seen have been set at least flush
if not a bit counteersunk into the wood. There is nothing there to
grab. Vice grips on the exposed thread is a possibility but will
screw up the threads, might allow unscrewing enough to get the
vicegrips onto the head and then force the nut over the screwed up
thread portion.

Harry K