Just because a certain size thread has a recommended torque is not the whole issue.
You never know how much thread engagement there is between the two threads . So what may torque up one screw nicely may strip another with less engagement .
Always remember , Gun sellers , gunsmiths , gun makers all hope you will damage your product so you have to get it fixed or buy a new one . Just because some spec says for example that 35 inch pounds is max torque does not mean it is wise to go straight to max torque . I always use the least amount that does the job and holds what it is supposed to hold on a gun . You can always add some extra . Stressing a thread right close to it's max tensile strength is just asking for it to pop later .
People who get inch pounds and foot pounds mixed up are a real worry .
I do all scope mounts and rings by hand and only use a torque wrench on alloy stocks and rigid pillar or block bedded jobs. It is fairly easy to crush a wood stock somewhat with too much torque .
