Buy an aluminum block of a profileless mounting system for solar panels.
The profileless mounting system is suitable for mounting on a roof made of corrugated board or bituminous tiles.
The profile is compatible with:
DIN933 M8 bolts (bolt with a hexagonal head);
nut DIN9323 M8 (flange nut).
Additionally, rivets/self-tapping screws and sealant are required.