When I use T-Nuts, I usually use 10-32 size with button head or hex head screws. But for the H290 compression horn and for the woofers on one π, two π and three π speakers, I like to use these fasteners:T-Nuts are good when post-construction serviceability is a concern, like for prosound speakers. But if you won't be going inside your speakers a lot, these screws are fine. They look good and will hold until about 20 loosening/tightening cycles, when the wood will stretch enough to tear through.