Head - the component which inserts into the base and provides a platform for seating the panel on the understructure. Typically provided with a leveling nut to provide for fine adjustment of finished floor height. Also provided with locations to fasten panels or stringers in place. There are many configurations of heads, and most are not interchangeable with others. This is the component most critical to matching replacement understructure.
If you are looking for a Head please visit our Panel and Component Replacement Center for instructions on how to get the exact items needed for your floor system.