It looks like we have come full circle on fasteners. Fifty years ago we soldered nuts to strips of brass or tin can stock to make nut plates for mounting motors to hardwood motor mounts. They were screwed in place prior to slosing up the back side motor mount area with balsa blocks which were then shaped to finish the nose profile.
As an aside the Bearcat pictured uses 5/16 socket head capscrews that mate up in brass inserts installed in 1x1 1/2 maple wing mounts molded into the fiberglass fuselage. This is 55# pulled by a DA-150
ORIGINAL: gow589
I have had poor luck with wing bolts on large scale airplanes. I am flying Ziroli Bearcats and a 96" P-51. I am using steel bolts. I have had problems such as the wood stripping. I tried blind nuts, they would com loose and spin. I tried brass inserts and they would come out. Ocasionally the bolt would fall out on it's own from vibration. I couldn't dare use any locktight to keep it in.
The solution for me was to bend some metal I had and weld a blind nut onto it:
The plate is then attatched to the block with a srcew:
I know not everyone has access to a welder but this is what ultimately worked for me. By fixing the nut I can now use some mild locktight to keep the bolts from vibrating out or loosening up.