3/4in Diameter - 1/4-20 UNC Female Threaded Brass Ball with 1/4in Slip Side Hole - Unfinished Brass. This solid brass ball features a 1/4-20 UNC Female Threaded Hole along with a 1/4in Slip Side Hole, allowing compatible threaded rods, screws, lamp pipe, and other lighting components to be securely ... See More