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Parametric Snap-On Knob for Shafts with Flats, hero tilt

Parametric Snap-On Knob for Shafts with Flats

The small part that fixes the whole thing.

3.1k downloads in the maker community

$7.99

Color: Gray

Printed in the USA when you order.

  • Made in the USA, printed when you order
  • Secure checkout, safe, encrypted, and trusted
  • Real human support, we are here to help
  1. 1.You order it
  2. 2.We print it fresh
  3. 3.It ships to you
  • Replaces lost or broken knobs on consumer electronics and DIY projects
  • Snap-on design with internal stress-relief slot for easy installation
  • Fits shafts with a flat side — no tools or adhesive needed
  • Fully parametric OpenSCAD design for custom sizing if needed

Lost the knob on your stereo, amp, or mystery gadget? We've all been there. This parametric snap-on knob is the perfect fix for consumer electronics and 3D printed workshop tools alike — a simple, clever replacement that fits shafts with a flat side.

The design features an internal stress-relieving slot that flexes as you push the knob onto the shaft, making installation smooth and secure without cracking. No glue, no screws, just a satisfying snap into place.

Originally created to replace a random knob that wandered off into the void, this little problem-solver has helped countless makers get their gear back in action. If you need a different size, the OpenSCAD source is fully parametric and ready to customize.

Will it fit? Check the numbers.

Size
15 × 15 × 8.8 mmsmaller than a coin
Material
PLA, solid color
Made
In the USA, printed when you order

Sizes come from the real model file, not a guess.

Want a different size? Have your own design?

Upload a file and get a price in seconds. We print it just for you.

Upload your file
$7.99

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