Emrys_250

I'm installing a foregrip for my vtl. When I try to screw the 90 degree elbow to the steel hose, it goes about halfway in then stops. I was going to try using a wrench to screw it in the rest of the way, but I wanted to make sure that I was doing it right. Should it stop screwing in halfway? Will using a wrench damage the threads? Also, do I need to locktite the threads?

__________________