The design of connector had to be such that the installation is tool free. Critical to quality always is consistency in connection, irrespective of installer skill. A platform technology of screw connector system was evolved. The shear head bolt so engineered, has the head of the screw bolt always shearing off when the designed torque is reached upon tightening the bolt over the conductor. The Shear bolt Lug is designed to have one or multiple shear points based on the size of connector. Serrations are made on the inside of the extruded alloy tube. The connector thus has firm point contacts with the conductor. Two paths of currents are created. One through the Shear bolt connector and the second through these point contacts.https://thepcatech.com/shear-bolt-lugs-connectors/ Two paths of currents are created. One through the Shear bolt connector and the second through these point contacts.
Shear bolt Lugs and connector - PCATech