A fully parametric spacer generator compatible with the MakerWorld Customizer. Set your bolt size, wall thickness, and height — download your STL instantly, no CAD software needed.
Designed with FDM tolerances built in: PLA and PETG presets automatically adjust the hole diameter so your bolt fits without forcing.
Typical uses: mechanical assemblies, electronics mounting, furniture hardware, picture frame wall standoffs, RC builds, repair parts.
Works for M3 through M10, from 1mm to 50mm tall. A ready-to-print collection of the most common sizes (M3–M8 × 3/5/10/15/20mm) is included for direct download.
Parameters:

Inner diameter
Wall thickness
Height
Material preset (PLA / PETG)
Chamfer on/off

No supports needed. Print vertically for best hole accuracy.