The best connector that i have found for my mods was the 510 shortie with a nut from madvapes. It has enough thread area to put a connector ring for the negative wire and being able to install the connector without using epoxy was great (my epoxy always broke loose in a few weeks). At under 3 bucks apiece they were great. Unfortunately they are now close to 7 bucks. I'm sure that price is in line with madvapes cost because they are great to do business with, but for folks trying to save a few bucks I found this Shorty 510 - 510 Connector or extension w/ nut (5 pack) | eBay I ordered a pack and will post back when I get them. The guy has great feedback.
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