Enclosure door knob

thingiverse

I created this basic door knob to keep my Hypercube printer's door closed while printing with ABS, which requires stable heat. Since the Hypercube doesn't have sides, it was struggling to retain heat, so I added panels and a door to improve insulation. I found suitable hinges but couldn't find a standard door handle, so I designed this primitive knob. It consists of an M3 30mm bolt and several 3mm nuts. The outer knob has a nut that secures the bolt in place, preventing it from turning. The inner knob also has a similar setup. However, tightening the last nut can be a bit frustrating due to its design.