for ME....I had lots of experiance with tightening screws and bolts, thus I have assembled mini14 gas blocks without measuring the torque applied to those screws.
mine are allen head...My method for tighten would be use a long "L" with the short end used to twist. Use ONLY thumb and two fingers to snug to avoid the common over tighting and damaging the threads.
A drop of low strenght locktite ob CLEAN threads