Bushing for 1/2" Knockout v3 with Built-in Zip-tie Base

thingiverse

This design boasts an external strain relief feature and a slim-profile chase bushing that can be secured in place by tightening the outer adjustment nut. As it happens, this is the third iteration of this particular design, so feel free to explore the previous two versions if you're looking for alternative configurations. While the parts may differ slightly between iterations, they remain largely interchangeable.