Inserts For Wood


Helisolid Wood Threaded Inserts

Helisolid® Wood Threaded Inserts are designed for use in hard woods, like oak, cherry, and maple. Ideal for use wherever assembly or disassembly could lead to thread erosion or stripping, Helisolid® Wood Threaded Inserts use a proprietary external thread to slice into wood and provide superior holding power.

Typical applications for Helisolid® Wood Threaded Inserts include furniture, cabinetry, partitions, and shipping containers. To install the insert, simply drill a hole and thread the insert into place using a screwdriver, bolt/jam nut, or optional drive tool.


  • Superior holding power in hard woods
  • Solid, one-piece threaded insert construction provides a high degree of pull-out strength
  • Provide a positive mechanical lock which prevents rotation due to vibration or torsion
  • Easy threaded insert installation and removal
  • Installed with standard drills and taps
  • No tang to break off
  • No pre-winder tool required
  • Full range of Inch and Metric sizes in coarse or fine pitch threads
  • Industrial Style Threaded inserts can be purchased in bulk quantities or kits

For particularly hard wood – or if there is difficulty getting the insert to thread-in straight – a drive tool can be made with full thread engagement for maximum control during installation.

  • Cut the head off a bolt with a thread corresponding to the insert internal thread (round off the cut end for safety).
  • Thread two nuts onto the bolt, followed by the insert (slotted end down).
  • Put the bolt into a hand drill or drill press.
  • Prior to installing, make sure the two nuts are threaded down to the top of the insert.
  • Thread in the insert
  • Loosen the nuts and back out the driver.
Insert Thread External Thread Length (mm) Drill Size (mm) Ordering No
(A) (E) (B) Stainless Steel Carbon Steel Brass
M3x0.5P M6x1.5P 6 4.2 to 4.4 B030S B030M B030B
M4x0.7P M7x2P 8 6.2 to 6.4 B040S B040M B040B
M5x0.8P M10x2.5P 10 7.2 to 7.4 B050S B050M B050B
M6x1P M11x3.5P 14 9.2. to 9.4 B060S B060M B060B
M8x1.25P M13x3.5P 15 11.2 to 11.4 B080S B080M B080B
M10x1.5P M16x3.5P 18 13.2 to 13.4 B100S B100M B100B
M12x1.75P M19x3.5P 22 15.2 to 15.4 B120S B120M B120B
M14x2P M22x3.5P 24 17.2 to 17.4 B140S B140M B140B
M16x2P M24x3.5P 22 19.2 to 19.4 B160S B160M B160B