When saw off part of the thread of the long bolt (screw, stud), in place of sawing produces burrs, dents. This makes it difficult to time the screws when screwing.
The matter is simplified if the threads are pre-screwed the nut, and then trim the bolt. When removing the nut itself will remove the burrs.
Recommend to read
BOX WITH BRAKE
One careless movement the child pulled the box out of the wall, and all content from a crash is on the floor. But the blame and not so much the baby, as the Pope: it is easy to do in the...
THE CREATORS OF “FIRE ARROWS”
The emergence of missiles in Russia noted by the chroniclers in the Pskov chronicle of the XV century In 1680 in Moscow organized a special "school" for the production of lighting and...