40MM NATO (RD40x1/7) to 3M™ Filter Adapter

thingiverse

This text is a detailed guide on creating an adapter for CBRN full face respirators using 3D printing, specifically designed to mitigate the global shortage of PPE during the COVID-19 pandemic. Here are some key points from the guide: 1. The adapter allows users to fit their existing non-disposable respirators with the more expensive and harder to source RD40x1/7 filter cartridges. 2. The adapter is a temporarily solution until supply chains return to normal and users can purchase OEM OSHA/NIOSH/EN standard approved respirators, adapters, and accessories. 3. It is recommended that users apply a thin layer of polyurethane clear coat on all exterior surfaces to help resiliency and durability for repeated sterilization. 4. The adapter has undergone several iterations, with the fifth iteration being the most recent.