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Heli-Coil Thread Inserts

4.83 out of 5 stars 111 Customer Reviews

Heli-Coil has the most effective and universally accepted method of thread repair. Heli-Coil inserts work in any part or material--aluminum, magnesium, cast iron, bronze, etc. Damaged threads can be restored to better-than-new condition in spark plug ports, carburetor fuel inlets, transmission housings, oil drain plugs, exhaust and intake manifolds, head bolt holes, brake calipers, and more. They are available in many sizes.

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Heli-Coil Thread Inserts HE5521-16

Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 6 Inserts, Heli-Coil, Kit

Part Number: HLL-5521-16

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

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