hand screw

noun
1.
a screw that can be tightened by the fingers, without the aid of a tool.
2.
Also called hand-screw clamp. Carpentry. a clamp having two wooden jaws that are adjusted by two long screws.

Origin:
1755–65

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Her work was as an operator of an automatic hand screw machine which was controlled by the use of hand levers.
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