DX Engineering Type-N connector assembly tools allow for the threading of the 2-piece Type-N connector sleeve onto the vinyl jacket of RG-8/U, RG-213/U, LMR-400, and other similar sized cables.
It's so easy! First, properly prepare the coaxial cable. Then place the prepared coaxial cable end into the body of the Type-N connector and make sure that all of the strands of the cable's center conductor are inserted into the center pin. Use the DX Engineering Type-N connector assembly tools to thread the Type-N connector body onto the stripped cable end. Tighten the Type-N connector onto the coaxial cable, and when the coaxial cable is fully seated, remove the tools and check to make sure that the coaxial cable is fully seated on the Type-N connector.
If all of the center strands are visible in the small hole of the center pin, then you're ready to solder the connections.