CNC Hold down clamps
thingiverse
Some hold down clamps are made specifically for 3/8" bolts. The quick release mechanism works by simply sliding between the thin side and thick side under the bolt washer. Two clamps shown in the photos are the most useful, but others have been needed sometimes. You can adjust the width of the clamps to make them work with different size bolts, or size the thickness to make them firmer or softer. Printing with PETG is recommended - this filament is excellent for making clamps. It's flexible and strong, and retains its shape well.
With this file you will be able to print CNC Hold down clamps with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on CNC Hold down clamps.