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Heli-Coil Thread Inserts

4.84 out of 5 stars 108 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.

Results 1 - 25 of 59

Thread Repair Kit, Helicoil, 5/16 in.-18 RH, 12 Inserts, Kit

Part Number: HLL-5521-5

4.94 out of 5 stars ( 18 )

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Thread Repair Kit, Helicoil, 3/8 in.-16 RH, 6 Inserts, Kit

Part Number: HLL-5521-6

4.83 out of 5 stars ( 18 )

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Thread Repair Kit, Helicoil, 7/16 in.-14 RH, 6 Inserts, Kit

Part Number: HLL-5521-7

4.75 out of 5 stars ( 16 )

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Thread Inserts, Heli-Coil, 8mm x 1.25 Thread, 12 Inserts, Kit

Part Number: HLL-5546-8

4.88 out of 5 stars ( 8 )

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Thread Inserts, Heli-Coil, 7/16 in.-20 Thread, 6 Inserts, Kit

Part Number: HLL-5528-7

4.86 out of 5 stars ( 7 )

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Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 12 Inserts, Heli-Coil, Kit M6x1.00

Part Number: HLL-5546-6

5.0 out of 5 stars ( 3 )

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Thread Repair Kit, Heli-Coil, 12-24 in., Kit

Part Number: HLL-5521-1

4.89 out of 5 stars ( 19 )

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Thread Repair Kit, Helicoil, 1/4 in.-20 RH, 12 Inserts, Kit

Part Number: HLL-5521-4

4.67 out of 5 stars ( 3 )

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

Part Number: HLL-5528-8

5.0 out of 5 stars ( 2 )

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

Part Number: HLL-5546-10

Not Yet Reviewed

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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 )

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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

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Thread Repair Kit, Helicoil, 10-24, 0.285 in. Length, 12 Inserts, Tap, Installation Tool, Kit

Part Number: HLL-5521-3

Not Yet Reviewed

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Thread Repair Kit, Helicoil, 8-32, 0.246 in. Length, 12 Inserts, Tap, Installation Tool, Kit

Part Number: HLL-5521-2

5.0 out of 5 stars ( 1 )

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

Part Number: HLL-5528-3

Not Yet Reviewed

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Thread Inserts, Heli-Coil, 14mm x 1.25 Thread, 3 Inserts, Kit

Part Number: HLL-5334-14

4.0 out of 5 stars ( 3 )

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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 )

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

Part Number: HLL-5543-10

4.5 out of 5 stars ( 2 )

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Thread Inserts, Heli-Coil, 6mm x 1.00 Thread, Set of 12

Part Number: HLL-R1084-6

Not Yet Reviewed

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Thread Repair Kit, Helicoil, 1/2 in.-13 RH, 6 Inserts, Kit

Part Number: HLL-5521-8

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

Part Number: HLL-5543-12

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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: Oct 6, 2025 if ordered today

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Thread Inserts, Heli-Coil, 12-24 in. Thread, Set of 12

Part Number: HLL-R1185-1

Not Yet Reviewed

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Thread Inserts, Damaged Thread Repair Kit. Any Part, Any Material, 6 Inserts, Heli-Coil, Kit M16x2

Part Number: HLL-5546-16

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 6, 2025 if ordered today

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Thread Inserts, Heli-Coil Repair, 14 x 2.00mm Size, Kit

Part Number: HLL-5546-14

Not Yet Reviewed

Estimated Ship Date: Oct 6, 2025 if ordered today

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