NATO / NIOSH CBRN / STANAG 4155 Screw Thread
thingiverse
There are quite a few "gas mask thread" things out there, but none that particularly inspired confidence in its compliance with specifications or how well they would interface with other components. [mfxpyro's thing](https://www.thingiverse.com/thing:3875269) has the right specifications listed, but I needed more documentation. The STANAG 4155 document is very hard to find, but it is currently available through the [CDC](https://www.cdc.gov/niosh/npptl/resources/pressrel/letters/lttr-083007.html), and it is available as a download. Produced to support work for Boston PANFAB.
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