How do I connect mk aluminium profile using only standard parts?

Screw connections allow users to create profile structures using only standard parts. The connection requires an M8 thread in profile 1 (extra light duty profile) or an M8 threaded insert. In profile 2, a ø10 mm bore is required at the spot of the connection to tighten the screw with an Allen key. For a seamless closure with an end cap, the bore should be 15 mm from the edge.