Boss Head Manufacturer, Supplier and Exporter for Chemistry Lab - For use with laboratory stand, diecasted alloy, accepts rod upto 16mm. diameter, which are secured with nickel plated brass tommy screws. A boss head, also known as a clamp holder or clamp boss, is a metal fitting designed to connect two perpendicular rods, typically found in retort stand setups. It serves as the intermediary between the stand’s vertical rod and the horizontal rod of a clamp or other attachment, allowing the user to securely fix equipment in place at the desired height and angle