What is a bolt used by shipwrights, to bend and secure the planks against the timbers till they are fastened by bolts, spikes, or treenails; -- not to be confounded with ringbolt called?

wringbolt — A bolt used by shipwrights, to bend and secure the planks against the timbers till they are fastened by bolts, spikes, or treenails; -- not to be confounded with ringbolt. (Webster's 1913.)

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