The ServoCity 6-32 UNC Nylon Ball Linkage - 4 Pack features nylon bodies designed for 6-32 hardware, with brass balls that accommodate a 0.14-inch thru-hole. These linkages allow a 6-32 screw or threaded rod to form threads upon initial insertion. The included cups enhance the range of motion by distancing the ball from the screw head, facilitating secure attachment to surfaces.