Screw Bushing Thread Repair Insert 20pcs 4-40 1D-3D Wire Stainless Steel 304 Helicoil Inserts(1.5D)

These stainless steel 304 thread repair inserts are designed for restoring and reinforcing damaged threads in metal, aluminum, and other materials. The 20-piece set includes sizes 4-40 with 1D to 3D lengths, providing versatile options for various repair needs. Each insert is made from Good 304 stainless steel for excellent corrosion resistance and durability.Ideal for use in low-strength materials, these inserts help prevent thread stripping and improve connection strength. They evenly distribute load across threads, reducing stress and enhancing fatigue resistance. Suitable for automotive, industrial, and DIY applications, these inserts offer a reliable solution for thread repair and reinforcement.

• Material - Metric thread insert is made of 304H stainless steel.
• Features - The thread repair kit has a certain elasticity and uniform load, which can make the load on the thread more uniform and eliminate the pitch deviation between the screw and the screw hole; the thread is deep and clear, not easy to slip, not easy to fall off, and not deformed.
• Thread Repair Solution: This insert nut assortment efficiently fixes stripped or damaged female threads in metal or ABS parts, restoring structural integrity without replacing entire components, ideal for quick repairs on machinery, automotive parts, or electronics.
• Premium Stainless Steel Build: Made from Good stainless steel, these inner thread inserts offer high hardness,Locking type wire screw sleeve secures screws in threaded holes, loosening under vibration and shock.
• Applications - Threaded sleeve is widely used in mechanical equipment and engineering machinery. It is the first choice for thread repair and overhaul in aviation, automobiles, steam turbines, electronic communications, computers, lamps, molds, radiators, and semiconductor equipment.