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.

Showing In Stock Items. Show All 61 Items.

Results 1 - 25 of 59

Heli-Coil Thread Inserts HE5521-6

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

Part Number: HLL-5521-6

4.83 out of 5 stars ( 18 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-5

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

Part Number: HLL-5521-5

4.94 out of 5 stars ( 18 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-7

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

Part Number: HLL-5521-7

4.75 out of 5 stars ( 16 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5546-8

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

Part Number: HLL-5546-8

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5546-6

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 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5528-7

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

Part Number: HLL-5528-7

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-8

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

Part Number: HLL-5521-8

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-4

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

Part Number: HLL-5521-4

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-1

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

Part Number: HLL-5521-1

4.89 out of 5 stars ( 19 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

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 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

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 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

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 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

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 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-2

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 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5521-3

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

Part Number: HLL-5521-3

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5334-14

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

Part Number: HLL-5334-14

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Heli-Coil Thread Inserts HE5546-16

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: Dec 15, 2025 if ordered today

...Loading

Estimated Ship Date: Dec 15, 2025 if ordered today

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 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

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: Dec 15, 2025 if ordered today

...Loading

Estimated Ship Date: Dec 15, 2025 if ordered today

Heli-Coil Thread Inserts HER3745-16

Thread Repair, Helicoil, 16mm x 1.50, 6 Inserts, Set of 6

Part Number: HLL-R3745-16

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

Page 1 of 3
Next