Helicoil

Helicoil 5521-4 is a compact 1/4-20 inch coarse thread repair kit that restores stripped or damaged tapped holes using 12 stainless-steel coil inserts, a purpose-made tap, and an installation tool. This kit supplies everything needed to rebuild worn or damaged 1/4-20 UNC threads to...

Helicoil 5521-5 is a complete 5/16-18 coarse thread repair kit that includes 12 wire-thread inserts, a Heli-Coil tap, an installation tool, and full instructions for restoring damaged or oversized tapped holes. This compact kit gives you the core tools needed to return stripped or...

Helicoil 5334-14 Save‑A‑Thread is a complete M14 x 1.25 spark plug hole repair kit that restores stripped threads with permanent, mechanically locked inserts. When a spark plug hole is stripped, engine repairs can become costly and time-consuming. The Helicoil 5334-14 kit delivers the essential...

Heli-Coil 5546-6 is an M6 x 1 metric coarse thread repair kit that restores stripped or damaged tapped holes with 12 wire-thread inserts, a matching plug-style tap and an installation tool. This compact kit supplies everything needed to rebuild worn or damaged M6 threads...

Heli-Coil 5546-8 M8 x 1.25 Metric Coarse Thread Repair Kit is a ready-to-use set that restores stripped or damaged M8 x 1.25 threads with 12 stainless-style inserts, a dedicated tap, installation tool, and clear instructions. When a threaded hole is worn, cross-threaded, or oversized,...