Custom masonry wall plugs for brick, block and concrete. Exact body, screw and expansion geometry — no hardware store run.
Common sizes to get you started:
These plugs are prototype parts with no tested load rating. Do not use them for overhead, structural or safety-critical fixings. Printed wall plugs are not a substitute for certified commercial wall plugs where load matters. Always test a printed plug in scrap material before installing it for real.
For light to medium fixings — pictures, shelves, light brackets — yes. They are prototype parts with no tested load rating. Do not use them for overhead, structural or safety-critical fixings. Test a printed plug in scrap material first.
PETG or ABS give better creep resistance and grip than PLA, which softens under sustained load. Print with 100% infill for maximum expansion force. PETG is the best all-round choice; ABS needs an enclosure.
The plug has radial slots open at the tip. When you drive a screw into the pilot bore, the screw body forces the slotted fingers outward against the wall of the drilled hole. The collar fins stop the plug rotating while the screw bites.