Du-Bro #379 4-40 Fully Threaded Rod 12" length an 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 (.072" rods w/2-56 thread) (.093" rods w/4-40 thread). Fully threaded rods are stainless steel, perfect for making custom lengths for your needs.