Chrislynn 3/4-10X1.500 STD Bulk Pack of 15 inserts, Chrislynn Corp, Mfr#: 84231

the precision insert system was devised as a simple method of repairing stripped or damaged threats in any metal or valuable part. Inserts are also used in new products, such as die castings or plastics, where excessive stress on threads could cause damage or failure.