50pcs Stainless Steel Thread Repair Insert M6 x 1.0 x 3D Length,Helicoil Screw Thread Repair Insert Wire Thread Insert: Amazon.com: Industrial & Scientific
E-Z LOK - 653-6 E-Z Lok Externally Threaded Insert, 303 Stainless Steel/Metric, M6-1.0 Internal Threads, 3/8"-16 External Threads, 10.31mm Length, Made in US (Pack of 5): Amazon.com: Industrial & Scientific