The acrylic insert demo cube

 

 
 
Key Insert After Installation.png

Key Detail

Here we have a key-locking insert installed in a clear acrylic cube. The yellow highlighted area is the location of the key after installation. The first few threads on the outside of the insert are destroyed by the key---preventing any rotational movement of the insert. 

 
Labeled Cube.png

The Demo Cube Details

1/4-20 Low-profile socket head cap screws installed in a 1.5" cube of cast acrylic. 

 
EZ Detail.png

Easy to Install 

Easy to install inserts come with a thread-locking compound. You can see the reddish material  worked into the threads in the picture to the left. This will help prevent unwanted movement, but it is not going to work for every application.