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.

Showing In Stock Items. Show All 17 Items.

Results 1 - 16 of 16

Heli-Coil Thread Inserts HE5546-10

Thread Inserts, Heli-Coil, 10mm x 1.50 Thread, 12 Inserts, Kit

Part Number: HLL-5546-10

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5528-8

Thread Inserts, 1/2-20 in. Size, Kit

Part Number: HLL-5528-8

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5528-6

Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 12 Inserts, Heli-Coil, Kit 3/8 -24

Part Number: HLL-5528-6

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5528-5

Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 12 Inserts, Heli-Coil, Kit 5/16-24

Part Number: HLL-5528-5

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5543-10

Thread Inserts, Heli-Coil, 10mm x 1.25 Thread, 12 Inserts, Kit

Part Number: HLL-5543-10

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5528-3

Thread Repair Kit, Helicoil, 10-32, 0.285 in. Length, 12 Inserts, Tap, Installation Tool, Kit

Part Number: HLL-5528-3

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5528-4

Thread Repair Kit, Helicoil, 1/4-28 in., 0.375 in. Length, 12 Inserts, Tap, Installation Tool, Kit

Part Number: HLL-5528-4

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5544-12

Heli-Coil Repair Kit, Installation Tools, Six Heli-coil Inserts, 12 x 1.50mm Insert Size, Kit

Part Number: HLL-5544-12

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5543-12

Thread Inserts, Heli-Coil Repair, 12 x 1.25mm Size, Kit

Part Number: HLL-5543-12

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Heli-Coil Thread Inserts HE5546-4

Thread Inserts, Heli-Coil Repair, 4 x .70mm Size, Kit

Part Number: HLL-5546-4

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5521-12

Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 4 Inserts, Heli-Coil, Kit

Part Number: HLL-5521-12

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5521-9

Thread Inserts, Heli-Coil, 9/16 in.-12 Thread, 6 Inserts, Kit

Part Number: HLL-5521-9

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5546-12

Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 6 Inserts, Heli-Coil, Kit M12x1.75

Part Number: HLL-5546-12

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5542-10

Thread Inserts, Heli-Coil Repair, 10 x 1.00mm Size, Kit

Part Number: HLL-5542-10

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5543-11

Thread Inserts, Heli-Coil, 11mm x 1.25 Thread, 16.5mm Length, 6 Inserts, Kit

Part Number: HLL-5543-11

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Heli-Coil Thread Inserts HE5546-11

Thread Repair Kit, Helicoil, 11mm x 1.50, 6 Inserts, Kit

Part Number: HLL-5546-11

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

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