Du-Bro Threaded Couplers (1/16") Part No: 111. Designed for use with Du-Bro Kwik-Links and ball links. One end has no threads and can be soldered on and the other side has either 2-56 or 2MM threads. #111 has 2-56 threads, threaded 3/4" (19 mm) with an overall length of 1 1/4" (31.7 mm). For 1/16" diameter rod.