Sometimes you want something easier to grip than a “wing-nut”, but smaller than a regular threaded knob. I made these “Finger Nuts” at the TechShop, www.techshop.ws, from ¼ in. Plexiglas using the Laser Engraver.
Step 1: Finger Nuts
Laser cut equal number of discs and nut holders.
Step 2: Finger Nuts
Depending on how many you are making, assemble the parts onto a ¼-20 bolt or suitable length of ¼-20 all-thread in the following order: nut, washer, disc, nut, nut holder, washer, disc, nut, nut holder, washer, as many as you care to, and finish with a washer and nut. In this view the nut holder on the right side is shown not seated on the nut, yet.
Step 3: Finger Nut
Barely tighten each nut. Use a drop of water thin Plexiglas cement at each disc/nut holder joint. The thin cement will be drawn between the disc and nut holder and weld them together. Give the cemented joints an hour or more to dry.
Step 4: Finger Nuts
Take the nuts and glued-up parts off the bolt or all-thread. Place the glued discs and nut holders, with the nut recess up. on a piece of wax paper. Put a nut in each recess and place a drop or two of medium viscosity CA glue to hold the nut in place.
Step 5: Finger Nuts
In use, the disc side goes toward the piece being held, so that the nut is trapped.