Inserts for Plastics | McMaster-Carr

The tapered shape makes it easier to guide these inserts into a hole during installation. Use a drill bit to create a straight hole, then taper the top half.

Tapered Heat-Set Insert Assortments
for Plastic with Installation Tools

Assortments include various sizes of inserts, a soldering iron, a ceramic insulation tube, and installation tips.

Heat-Set Inserts for Plastic

Install these inserts into plastic parts to create a secure base for fasteners.

Male Threaded Heat-Set Inserts for Plastic

With the male threaded end on these inserts, mount components directly to plastic parts.

Brass Screw-to-Expand Inserts for Plastic

Made from brass, these inserts are electrically conductive, nonmagnetic, and have good corrosion resistance.

18-8 Stainless Steel Screw-to-Expand Inserts for Plastic

These 18-8 stainless steel inserts have better corrosion resistance than brass inserts and may be mildly magnetic.

Aluminum Screw-to-Expand Inserts for Plastic

These aluminum inserts are 70% lighter than brass inserts, electrically conductive, and nonmagnetic. They have good corrosion resistance, which is comparable to brass but not as good as stainless steel.

Brass Flanged Screw-to-Expand Inserts for Plastic

Made from brass, these inserts are nonmagnetic, corrosion resistant, and electrically conductive.

18-8 Stainless Steel Flanged
Screw-to-Expand Inserts for Plastic

These 18-8 stainless steel inserts have better corrosion resistance than brass inserts and may be mildly magnetic.

Aluminum Flanged Screw-to-Expand Inserts for Plastic

Screw-to-Expand Inserts for Through Holes in Plastic

The flange keeps these inserts from pulling through a hole. Press them in from the underside of material, and install a screw from the top of material.

Pull-Out Resistant Screw-to-Expand Inserts for Plastic

18-8 Stainless Steel Twist-Resistant
Hex-Shaped Inserts for Plastic

These 18-8 stainless steel inserts have better corrosion resistance than aluminum inserts and may be mildly magnetic.

Aluminum Twist-Resistant Hex-Shaped Inserts for Plastic

70% lighter than stainless steel, these aluminum inserts are mildly corrosion resistant and nonmagnetic.

Barbed Inserts for Plastic

The barbed sides keep these securely in place even before a screw is installed.

Push-to-Expand Inserts for Plastic

Push down on the inside of these inserts with an installation tool and they expand to hold firm in surrounding material.

Ultra-Fine-Threaded Inserts for Plastic

Use these inserts to install fine-thread screws in existing holes.

Tapping Inserts for Plastic

Also known as Trisert inserts, these cut threads into plastic and have better holding power than press-fit inserts.

Threaded Inserts for Composites

Tee Nut Inserts for Fiberglass

A wide flange distributes the load over a large area. Hammer these inserts into a drilled hole.

Press-Fit Threaded Inserts for Composites

Press these inserts into a drilled hole and the flexible metal teeth anchor them in the material. Use them with carbon fiber, fiberglass, and garolite.

Socket Nuts

Stainless Steel Socket Nuts

Stainless steel nuts have excellent corrosion resistance in most environments.

Alloy Steel Socket Nuts

Stronger than stainless steel, these nuts are comparable in strength to Grade 9 bolts.

Threaded Inserts for Plastic

Tapered Heat-Set Inserts for Plastic

Tapered Heat-Set Insert Assortmentsfor Plastic with Installation Tools