I have an XR drive with sportsmaster lowers. What is the recommened torque lbs for the nut? What size socket will I need for my torque wrench? Thank you!

It's a 1 1/16" socket. I'm not sure anyone actually torques them down. I just use a 1/2" breaker bar and just get it tight. It does not need to be overly tight, but just enough with the breaker bar.
-Tom

Aren't the yellow prop wrenches plastic? Just curious how much torque props need if the wrenches are plastic.

Torq value is 55 ft./lbs.

That's tight with a small umph.

Yellow's are plastic. They are good in a pinch for a few uses. They float.