MSA Mask Blanking Plug

A remix of the MSA to 3M adapter at https://www.thingiverse.com/thing:3465957 with the 3M part removed and the hole filled to create a blanking cap. Potentially useful for when you want to wear a respirator while doing something that requires more clearance on one side of your face than the filter allows for. Obviously don't use more than one at a time.

I printed this on edge with tree supports, in PLA with 20% fill at 0.2mm with a .6mm nozzle, and it seals and seems strong enough, but your mileage may vary. Definitely test the seal before relying on this for anything, and use at your own risk.