The Dubro Ball Link 2-56 Threaded #181 5 piece ball link set is excellent for off-set steering, throttle and servo hook-ups.
The ball is threaded for a 2-56 nut. Threaded coupler has 3/4" with 3/8" 2-56 thread, for up to 0.072 wire. Self-threading nylon socket, washer, and 2-56 nut included.