Angled Brackets with screw thread????

[LonesomeSpaceboy]

Im trying to join the top of a modified Commadore 64 case to the bottom, but cant work out a way to do it without welding bolts to the inside of an angled bracket a i can find any that have thread for screws. Anyone know where to get such a thing?
Isaac

[LoFi-Ninja]

Get a screw die & tap set.. Then your in control of the screws and threads !