A screw of polished steel also called of hexagonal head to the base of calibrated rounded rod threaded in its two extremities, placing in one of them the head or nut and fixing it with a pin cylindrical prisoner introduced to pressure in (Machine-translation by Google Translate, not legally binding)

摘要

Polished steel screw model also called hexagonal head based on round calibrated rod threaded at both ends Placing the head or nut on one of them and fixing it with a cylindrical stud inserted between the two connecting walls. (Machine-translation by Google Translate, not legally binding)