Free-Running Helicoils | McMaster-Carr

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1,013 Products

How to Install Helical Inserts

About Helical Insert Length

Stainless Steel Helical Inserts

Stainless Steel Helical Inserts
for Particle-Free Environments

Made of Nitronic 60 stainless steel, these inserts prevent the screw from binding or sticking without any coating or lubricant that could contaminate particle-free environments.

Lubricated Stainless Steel Helical
Inserts for Dissimilar Metals

Eliminating the need for primer, these inserts are coated to resist corrosion when installed in different materials.

Lubricated Stainless Steel Helical Inserts

A dry film keeps the screw from sticking or binding in these inserts during installation.

Nickel Alloy Helical Inserts

Made of nickel alloy, these inserts are more resistant to acids and salt water than stainless steel inserts.

Titanium Helical Inserts

These inserts have a high strength-to-weight ratio and resist acids and salt water better than nickel alloy and stainless steel inserts.

Stainless Steel Helical Inserts without Prong

Without a prong to break off and retrieve, these inserts are often used where debris could cause damage.

Lubricated Stainless Steel
Helical Inserts without Prong

A dry film keeps the screw from sticking or binding in these inserts during installation.

Helical Insert Assortments with Installation Tools

Assortments include various sizes of helical inserts and a tap, a drill bit, and an installation tool for each thread size.

Helical Inserts with Installation Tools

Inserts come with a through-hole tap and installation tool.

Spark Plug Thread Repair Kits

Kits include helical inserts, a tap, and an installation tool.

Spark Plug Thread Repair Kits for
Gasket-Seat and Taper-Seat Ports

These kits have short-, normal-, and long-reach inserts, an installation tool, and a tap.