Helical Threaded Inserts

Helical threaded inserts are coiled metal inserts that create durable internal threads in softer materials like aluminum, magnesium, plastics, or wood; use them to repair stripped threads, strengthen new threaded joints, or allow repeated assembly/disassembly without degrading the parent material

Select an insert by matching the internal thread size to the fastener and the external/installation size to the hole or tap specified by the insert's installation chart; choose stainless steel for corrosion resistance, carbon steel for general strength, and compatibility with the parent material and operating environment

Installation typically requires the correct tap for the parent material, a thread insertion tool or mandrel, and a tang break-off tool or punch; many manufacturers and suppliers offer kits that bundle inserts with taps and installation tools for common sizes

Yes—special blind-hole inserts and installation methods exist that use tangless or break-off tang designs; blind-hole inserts are installed to the required depth and then the installation tang is removed or crumpled to allow full thread engagement

Periodically inspect for looseness, corrosion, or deformation, ensure mating fasteners are within torque specifications, and replace inserts that show thread wear or damage; apply anti-seize or appropriate lubricants if operating in corrosive or high-temperature environments

In many cases the fastener can be removed and reinstalled repeatedly, but inserts themselves are generally not intended for reuse once removed; removal is possible with extraction tools or by driving the insert out, which may damage the hole and require re-tapping or replacement

Individual inserts are low-cost, while comprehensive kits with multiple sizes, taps, and installation tools span a wide range; shoppers can find budget kits under $50 and more complete or specialty kits priced higher, with average product prices in the broader category typically around the mid tens to low hundreds of dollars