Du-Bro Aileron Connector Ball Link Part No: 183. 5 piece set includes one 2-way self threading nylon socket, 2 threaded couplers 3/4" long with 3/8" 2-56 thread, for up to .072 wire, 1 ball threaded for 0-80 \(1/16 diameter thread\) and one 0-80 hex nut.