Du-Bro 4-40 Threaded Rods \(30" - 762mm\) \(12\) Part No: 145. Can be used in conjunction with our nylon or steel Kwik-Links or with ball links where extra long pushrods are needed. Bendable and strong. Rods are available 3/4" \(19 mm\) thread on one end \(.093" rods w/4-40 thread\), perfect for making custom lengths for your needs.