It's a type of fastener with a large, easy-to-grip head that you can tighten and untighten by hand. It's typically used in two scenarios: Space is too limited to allow for the use of a tool. A non-permanent fastener is needed for convenient access, reducing maintenance and inspection times.
What is the spec of a thumb screw?"); display: inline-block; height: 24px; width: 24px; transform: rotateZ(-180deg);">Typically, thumb screw sizes—listed as whole numbers and fractional inches—range from #6 to 3/8" in diameter; 1/2" may also be available. Lengths start at 1/4" and go up to about 6". Only larger sizes are available in long lengths. Measure Type A length from under the shoulder to the tip.
The thumbscrew is a torture instrument which was first used in early modern Europe. It is a simple vice, sometimes with protruding studs on the interior surfaces. The crushing bars were sometimes lined with sharp metal points to puncture the nails.
