R2 with some cosmetic and material changes.
We sought permission from evolv to use key parts of their open source reference 510 connector to base our new 510 design on. While they look similar from the outside the changes are significant enough for none of the parts to be compatible between connectors so please don't buy these to transplant parts. At best just the nut and solder lug will be compatible but there's no guarantee.
Can be soldered intact and fitted. It's helpful to insert an atomizer to raise the pin out slightly before soldering. Use flux and dont exceed the melting point of PTFE @ 327°C. No one has managed to melt one yet, just be careful. Alternatively use circlip pliers with 0.9mm nibs to remove the retailing ring and solder disassembled. Just remember to thread the wire through the retaining ring and washer first.
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For those of you 3d printing or designing enclosures we're providing basic CAD models. Some may require you to right click and select save as.