Review on 🔩 Socell 1/4"-20 Brad Hole Tee Nut: High-Quality Carbon Steel Round Base Screw-in T-Nuts for Furniture Hardware – Flange Insert with Female Thread (20pcs) by Kenneth Bryan

I received these for assembling a collapsible workbench for my carpentry workshop. They were inserted into 3/4 size MDF boxes to screw diagonal posts and a solid oak panel. The 1/2" hole was too tight, so I wiggled a little, widened the hole a bit, and then tightened the nuts into the holes on the using a 3/8" bolt, nut, washer and two other side 9/16" wrenches. .Easy no-brainer. They fit so snugly on the MDF I didn't bother to screw in the flange. Very solid!