So a couple weeks ago I replaced my CV axle and put in a new hub assembly in all the videos I watched and even the guy at O'Reilly's said nothing about an axle nut so I wanted to verify on here if a 99 4x4 ranger needed an axle nut on the driver side CV and if so can I just take off my manual hubs off and screw it on easy peasy

 

The 99 didn't have a live axle. It had the hubs to lock the 4x4. Unless you do a live axle conversion it's not applicable to your specific setup.