15x15 mm junction 45 degrees for square round tubes aluminium profile

thingiverse

This human-sized system fits perfectly in a 15x15mm square or round tube from any standard DIY store. Measure the inside dimensions carefully, which are exactly 15.5mm by 15.5mm. It comes equipped with a reliable M5 nut that threads securely internally. Easy to print at home, this product requires minimal hassle. To assemble the framework, a .8mm shell thickness and 25% filling are all it takes. The weak link in this system is its aluminum hollow section profile, which can be prone to failure. When securing it in place, tighten the screw just slightly to avoid causing any unnecessary stress.