Tension Control Bolts

A three piece fastening system consisting of: 1) a round-head bolt with a truncated, flat surface area at the top of the bolt, and a 24-sided tip which protrudes from the opposite end. The tip is calibrated to shear off when the proper tension is achieved; 2) a 2H heavy hex nut; and 3) a structural flat waster.
Commonly used in structural steel joints in heavy construction. Has several advantages over traditional structural bolts which includes A) no operator or tool can over torque the fastener, B) the fastening can be visually inspected--when the tip is gone, the tension is correct; C) installation is faster, easier and can be done by one person; D) installation process is quieter.