Thumbscrew

Thumbscrew can mean:

Thumbscrew (torture), a screwed device formerly used for torture
Thumbscrew (fastener), a type of screw with a tall head and ridged or knurled sides, or a flat vertical head, intended to be tightened and loosened by hand

See also

Computer case screws
Wingnut (hardware), a nut with two large metal wings on, intended to be tightened and loosened by hand

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