3m respirator filter/cartidge adapter

thingiverse

I combined the 3m bayonet lug and the 3M 603 filter adapter to create this 3M 603/3m 502 love child. You can use this as a 603 filter cover, as a 502 adapter (so that you can attach the 2000 series pancake filters) or you can use it as both. 3m filter cover.stl should only be used if you have the required foam padding/O-ring. 3m filter cover 2.stl has a reduced bayonet adapter height and therefore can be used to attach a 2000 series filter snuggly without a foam padding. I would recommend that you add some extra padding around the attached filter to improve the air seal. Use this at your own risk.