Here’s the good news: The bench is assembled and works well. I’ll explain the construction details in the coming days.
And the bad: I destroyed one of the knockdown fasteners tonight. I tightened one of the 3/8” hex-head bolts that fastens the top, and the head of the bolt began to spin freely. Nuts on the tee-nut. The collar of the tee-nut had ripped free from its mounting plate. The broken metal looks porous and weak. I am not happy.
I am going to torture-test a few of these tee-nut fasteners from McMaster-Carr and see if they all break or if that one is an outlier.
— Christopher Schwarz