Check the listing for details. 34079 Pro-Thread Kit UNF 7/16 - 20. Condition: New. Listed at 35.00 USD. CLICK HERE TO VIEW PRO THREAD FLYERPro-Thread Kits offer a cost effective method of repairing and strengthening threads in various materials such as cast iron, steel, aluminum, and other metals and plasticsEffective for automotive repair, spark plug ports, outdoor power equipment, motorcycle repairs, farm equipment, and more!Easy to install, just DRILL, TAP, INSERT, SNAP!Pro-Thread inserts provide a permanent wear resistant internal threadStainless steel inserts resist the effects of temperature and corrosion Wire inserts help to compensate for the thread and pitch angle errorsRepaired threads are generally stronger than the original parent material thread ΓÇó Thread Size: National Fine UNF 7/16-20 ΓÇó Includes tap, installation tool and set of inserts ΓÇó 1.5D, 0.6563" OAL inserts ΓÇó Tapping drill required: 11.5mm or 29/64" ΓÇó CTA Insert Replacements: Part #24079