Customizable Thumbscrew

This is a customizable thumbscrew for hex bolts of various sizes. You can set the hex width (across parallels,) hex height, bolt width and the slack factor (I default to 5%, aka 1.05, use whatever prints best for you.)

You can also set the number of protrusions (bumps), their size and the height of the shaft. The shaft height can be important if you need to keep the thumbscrew part standing off a particular distance from whatever the shaft is pressing against.

US hex bolt size chart: htt