Furniture bed bolt M6 x 80 mm with allen key and barrel nut M6. This is a standard connector for 90 degrees joint, used in bed assembly. This is a sturdy solution because most of the tension is between metal elements. Allen key SW - 4 is required.
Connection system consists of: M6 x 80 mm bolt qith metric thred, barrel nut 10 x 13 mmwith M6 thread