MaterialThis new type of thread repair insert is made of stainless steel, which has higher hardness than normal screws, and they are strong and durable enough to provide repeated use and frequent disassembly. Self-tapping thread inserts made of 302 galvanized steel. Easy to installThese self-tapping thread inserts can be installed directly, without the need to tap the thread first, and can be directly screwed into the hole reserved for the base material. Strong anti-vibration performance to prevent loosening. ApplicationUsed in automobile industry, household appliances, engineering machinery, commercial machinery, electronic products, engineering plastics, high-end furniture, aluminum die-casting and other industries. Used in various low-strength materials, which can improve the wear resistance of bolted joints and avoid thread damage. Anti-loose designThe thread repair inserts can strengthen the connection force and improve the connection condition, which can avoid thread slippage and bad tooth phenomenon. The lock-type thread screw sleeve can lock the screw in the threaded hole, so that the screw will not loosen when subjected to shock vibration. Package includesTotal 116pcs. Thread is a new type of fastening technology, which can effectively improve the connection condition.