Hello TexP51. That is RH thread. Should be 1/2-20 NF. On mine, I used an impact gun to remove the nut, and a strap wrench to hold the pulley to torque the nut. It was a *****, but I got it torqued. I suppose you could use and impact to torque the nut, just be carefull of over torquing.
Seth K. Pyle
Seth K. Pyle
