V-Coil 5/8 UNF X 18TPIWire Thread Insert Repair Kit. 1 x 5/8 UNF x 18 Sti V-Coil Second lead Tap - for cutting a new thread for the wire insert. 10 x 5/8 UNF x 18 x 1.5D Stainless Steel Wire Thread Inserts.
eBay