Threaded Insert FAQs

What is a Threaded Insert?

Groov-Pin threaded inserts are cylindrical, metal bushings with features on the outside that lock them into a plastic or metal base material to anchor fasteners. They provide high-quality, permanent, wear-resistant internal threads and are designed to be installed in molded or drilled holes in one simple step. While each style performs in a range of materials, they are generally classified by the method of installation: thread-cutting, thread-forming, push-in, or ultrasound.

 

Why do I need a Threaded Insert?

Threaded inserts are designed to improve the strength of assemblies by distributing forces from the fastener over a larger area in the base material, thus increasing their load-bearing capability. For metals such as aluminum, this means full utilization of high-tensile-strength fasteners. In plastics, threaded inserts avoid wear and cold-flow problems encountered with thread-forming screws. Threaded inserts offer both engineering and cost economies.

 

Which type of Threaded Insert should I use?

This depends on the base material that the insert will be installed into and the application. Regular length inserts can be used to maximize pull-out strength, while medium or short inserts are used in applications where less strength is required or where space is constrained.

For metals such as aluminum, we recommend: Tap-Lok Hole Series, Tap-Lok Slotted Series, Speedserts

For plastics, we recommend: Speedserts, Tap-Lok Coarse Series, Barb-Sert

For wood, we recommend: Tap-Lok Wood Series

 

What materials are Groov-Pin Threaded Inserts made from?

Steel, Stainless Steel, and Brass

 

What is the recommended hole size for installing Threaded Inserts?

The hole size will depend on the size and type of threaded insert that you are using. See our Threaded Insert Guide for the appropriate hole size for each insert.

 

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

A hole should be 1.2 times the insert length.

 

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

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.

 

How do I install Tap-Lok and Speedserts Threaded Inserts?

You can install Tap-Lok threaded inserts and Speedserts with a “production” or “hand” 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 to the work. Hold the stud against rotation and loosen the nut with a wrench. Unscrew the stud from the insert.

 

What is the pull-out resistance of Groov-Pin Threaded Inserts?

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

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

 

Why does a Threaded Insert increase the pull-out strength of the base material?

The insert increases the pull-out strength of a base material by increasing the area of material that must be sheared to get the screw out. Increased shear area using an insert results in greater pull-out resistance for the installed fastener and greater clamping strength in the soft material.

 

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

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