Threaded Inserts


Threaded inserts are handy for creating your own workholding surface and clamps. A surface with threaded inserts allows you to easily fasten your clamps to hold materials down. These threaded inserts are ¼”-20, are suited for soft wooden materials such as MDF, and are commonly used in open-source clamp designs.

This item is sold in 25 and 100 piece packages.

Workholding table ideas from the community can be found here:



Dimensions: 1/4″-20 internal thread. 13mm long.

Drive Type: Hex head

Material:  Zinc steel


  1. Pre-drill a 5/16 or 9mm the hole for the threaded insert. You may also want to counterbore the hole to allow the insert to sit below the surface.
  2. Screw the insert into the hole using a 6mm Allen key or bit.
  3. Use 1/4″-20 fasteners with the insert.

Additional information

Weight0.1 lbs
Dimensions1 × 1 × 1 in

25 pieces, 100 pieces