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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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$11.99
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$19.99
Repair stripped or damaged spark plug threads! Heli-Coil spark plug threaded inserts are manufactured from 18-8 round stainless steel wire formed into a 60 degree diamond-shaped wire. This cold-worked wire (which has a tensile strength of 200,000 psi) is wound into a helical coil with a driving tang and notch—to remove the tang after the insert is screwed into the Heli-Coil tapped hole. In their free state, the inserts are larger in diameter than the tapped hole. Once installed, each insert assumes the configuration of the tapped hole. The resulting outward spring-like action anchors the inserts in place. The Heli-Coil spark plug inserts become an integral part of the cylinder head, providing high-strength threads which exceed in surface smoothness, hardness, and accuracy than any other threads.
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$19.99
Heli-Coil is an effective and universally accepted method of thread repair, and Heli-Coil taps are available in many of their thread repair kits and individually to help you restore damaged threads to better-than-new condition. The taps are manufactured from steel to the same exacting quality systems required by the military, aerospace, and automotive standards. Heli-Coil taps are available in a range of sizes, and will allow you to create a hole to the sufficient depth to accommodate the insert length and bolt or screw being used.
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$13.99
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