Old Style (~74mm Nato) Filter threads
thingiverse
This thread provides a foundation for building projects based on the classic 74mm NATO filter standard. You can sometimes score a good deal on these filters, like this one: https://smile.amazon.com/gp/product/B00I0G0V96/ref=oh_aui_search_detailpage?ie=UTF8&psc=1. The sample part uploaded adapts a linked P100 filter to fit the input of an affordable organic vapors filter. I'm currently working on developing a fume filter for 3D printers. For example, a cheap organic (charcoal) filter like this one can be found at: https://smile.amazon.com/gp/product/B000XUF7RI/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
With this file you will be able to print Old Style (~74mm Nato) Filter threads with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Old Style (~74mm Nato) Filter threads.