Sperian Respirator Cap (Survivair, Honeywell)
Description
This cap was made to fit the Sperian Opti-Fit Air Purifying Respirator mask. Currently, I can't get a good seal with it, so it's a work in progress. Using thread tape (3 layers), i was able to get a much better seal, but still not good enough. The cap should also work on the "Survivair Opti-Fit" and the "Honeywell Optifit" because they're all the same mask. This will not attach to 40mm Nato masks intended for CBRNE use. The female cap should not be transformed into male threads, because the female threads sized up by 5%. I'll include a model of the male threads that fit into the S-Series filters, as well as a "double" height one (that is not beautifully modeled), but allows you to thread it in further. You can use these male threads for making enclosure filters or room filters, adapters etc..
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