Threaded Insert with Flange and Hex Key or Coin Drive

This is a lightweight threaded insert designed for softwood where mechanical load is minimal, but resistance to moisture and soil contact is required.

✅ Best printed in PETG for durability
✅ Ideal for garden frames, temporary fixtures, or seasonal assemblies
✅ Designed to screw in and stay in softwood – no hammering or glue required
✅ Includes optional flange to prevent pull-through in through-holes

Details

✅ Uses the OpenSCAD threads.scad standard library
✅ Driven with a 5mm hex key (Allen key). Customizable.
✅ Inner thread: M3 and M4. Customizable.
✅ Pilot hole: 3/8in (~9.5mm). Customizable.

Printing Notes

✅ Print with flange up for best overhang handling.
✅ Use 100% infill for maximum strength.
✅ Clearances are tuned for my printer - test fit before production.
CLEARANCE_THREAD = 0.2 mm
CLEARANCE_HEX_KEY = 0.1 mm