Frequently Asked Questions About Threaded Inserts

Threaded Inserts

Q: What type of Threaded Insert should I use?

A: This depends on the base material that the Threaded Insert will be installed in and the application.

For metals such as aluminum, we recommend:

For plastics, we recommend:

For wood, we recommend:

Q: What materials are your Threaded Inserts made from?

A: Our Threaded Inserts are made from Steel, Stainless Steel, and Brass.

Tap-Lok® Threaded Inserts


      • Stainless Steel


      • Brass

Q: What is the recommended hole size?

A: The hole size will depend on the size and type of Threaded Insert that you are using. See our Threaded Insert Catalog for the appropriate hole size for each Threaded Insert.

Example: 10-32 Speedserts® going into aluminum has a recommended hole size of .263

Q: How deep does a hole have to be to use Groov-Pin Threaded Inserts?

A: 1.2 times the insert length

Q: Can I use a cored hole instead of a drilled hole?

A: Yes, as long as the draft angle of the cored hole is not too great. If the Threaded Insert cannot be installed flush with the base material, then you have to reduce the angle until the insert can be installed flush.

Q: How do I install Tap-Lok®s and Speedserts®?

A: You can install Tap-Lok®s and Speedserts® with our "production" or "hand" Threaded Insert tool.

Production Tool:

Attach our production tool to a drill press with a tapping head. Thread the insert onto the nose of the tool. Bring down the drill press, turning the insert into the base material. Once the insert is flush with the base material, the clutch in the tapping head will reverse, leaving the insert installed.

Hand Tool:

Attach the hand tool to a drill press or power tool. Thread the insert onto the stud of the tool until it contacts the nut. Turn the insert into the base material until it is flush making sure to keep the tool perpendicular with the work. Hold the stud against rotation and loosen the nut with a wrench. Unscrew the stud from the insert.

Q: How do I install a Barb-Sert®?

A: Barb-Sert®s can be installed in plastic by:

    1. Pressing them into the base material
    2. Ultrasonic welding
    3. Insert molding

Q: What is the pull out resistance of your Threaded Inserts?

A: Pull-out resistance depends on the type and size of the insert as well as the base material. See our Threaded Insert Catalog for the performance data for each series of Threaded Inserts installed in various materials.

Example: The pull-out resistance for a 10-32 Speedserts® in aluminum is 2,250 lbs.

Q: Why do I need to use a Threaded Insert?

A: Groov-Pin Threaded Inserts provide permanent, wear-resistant internal threads with increased pull-out strength to anchor fasteners in metal, plastic, or wood base materials. Threaded Inserts can be used to repair stripped holes, to increase the durability of holes in thin base materials, to increase load-bearing capacity, and to provide faster, one-step installation.

Q: Can you manufacture a special version of any of your Threaded Inserts?

A: Yes, this can be arranged after speaking to one of our sales representatives. Contact our sales team to get started.