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.