338PCS Threaded Inserts for Plastic, M2 M2.5 M3 M4 M5 M6 Heat Inserts with Heat

338PCS Threaded Inserts Set?. Wide Applications?. Fast Heat Installation?. High-Performance Brass Material?. Knurled Thread Design?. - Precision-engineered knurling maximizes surface friction, preventing rotation or loosening during heat insertion.

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