I saw a tech with a tool for tightening or loosening F-6 connectors. (7/16") It looks like a hexagon tube about 3 inches long with an open slot on one side to lay the coax cable in and then slide it down over the 7/16" connector nut. It makes hand spinning the connector tight or loose very easy.
This is CABL.com posting #139830. Tiny Link: cabl.co/mKxu