can i dab the residue in my adapter from my dabbing set?

I put the butane torch to the adapter and all of this melted and dripped down, is it like resin in a pipe from smoking bud?

Pretty much just like smoking resin from pipes/bongs but if you are using just concentrates then it will obviously be stronger.

Yeah you sure can!

You can dab it, but if you get your nail too hot during use (ie red - almost impossible not to do with a nail, if its not too hot it doesnt vape/burn all the oil and it runs down the side or stays on the nail head and burns away next hit) then there will be some toxic combustion products that will taste kinda bad, and it will be higher in CBN and CBD than the starting oil as the heat will have broken down some of the THC. If you want a rig that can infinitely reuse the condensate inside the bowl, I suggest a concentrate bowl and glow wand setup, there is much less scorching than with a nail so the oil condensate tastes wonderful.

Check out the link in my sig, the "Apparatus" section