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About Threaded Inserts
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Choose the right threaded insert for your application and learn how to install it securely.
Mil.-Spec. Key-Locking Threaded Inserts For Soft Metal
 |
These inserts are manufactured and tested to meet or compare to strict standards adopted by the U.S. military. The keys drive into aluminum and other soft metal for a secure hold that won't slip or rotate, even in vibrating vehicle or aerospace parts. These inserts are comparable to Keensert inserts.
To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
Thin Wall—Use these inserts near the edge of workpieces or wherever you only have space for a small hole. They're also lighter than standard and extra-thick wall inserts for applications with strict weight limitations.
18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
Helical Threaded Insert Assortments with Installation Tools
 |
Repair damaged threads or create new ones. These convenient assortments include helical inserts, an installation tool for each thread size, a drill bit, and a tap. The inserts are also known as Heli-Coil inserts.
Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
No. of Inserts Included | Includes | Thread Spacing | Drill Bit Size | For Max. Hole Dia. | Each | |||
|---|---|---|---|---|---|---|---|---|
Pronged | ||||||||
18-8 Stainless Steel | ||||||||
| 36 | 12-24 Thread × 0.216" Installed Lg. (12 Each) 12-24 Thread × 0.328" Installed Lg. (12 Each) 12-24 Thread × 0.432" Installed Lg. (12 Each) Drill Bit Installation Tool Prong Break-Off Tool Through-Hole Tap | Coarse | 15/64" | 0.234" | 91732A917 | 000000 | ||
Helical Threaded Inserts with Installation Tools
 |
Drill Bit, Installation Tool and Through-Hole Tap |
Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.
Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Pronged | |||||||||
18-8 Stainless Steel | |||||||||
| 12-24 | 0.324" | 15/64" | 0.234" | 10 | Drill Bit Installation Tool Through-Hole Tap | 91732A918 | 000000 | ||
Tight-Space Rivet Nuts
 |  |
Add threads to sheet metal and panels in confined spaces with limited backside clearance. At installation, these compact nuts collapse into themselves and press slightly outward, creating snug-fitting threads half the length of a standard nut but just as strong. With a thin top flange that creates a near-flush fit, they're ideal for light duty fastening in small enclosures or housings.
Install these nuts using a hand- or power-driven rivet nut tool. In thick material, drill or punch a slightly larger hole to ensure the nut body expands uniformly.
Tin Zinc-Plated Steel—Twice as strong as aluminum rivet nuts. The plating resists rust and helps the nut collapse without friction during installation. It's also nontoxic, unlike cadmium plating.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Screw-Locking Helical Threaded Inserts
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Pronged |
The irregularly shaped threads tightly grip screws to prevent them from loosening or backing out under vibration. Use these inserts to create or repair threads in pumps and other machinery that shakes and rattles. Also known as Heli-Coil inserts.
Installation requires a drill bit, a helical insert tap, and an installation tool.
Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
Inserts | Through-Hole Taps | Closed-End Hole Taps | Installation Tools | Prong Break-Off Tools | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Specs. Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||||
Pronged | |||||||||||||||||
18-8 Stainless Steel | |||||||||||||||||
| 12-24 | 0.216" | 1 Ga. | 0.228" | MS21209C2-10, NASM21209 | 10 | 90296A032 | 000000 | 91709A067 | 000000 | 91709A434 | 000000 | 90261A110 | 0000000 | 92955A109 | 000000 | ||
| 12-24 | 0.324" | 1 Ga. | 0.228" | MS21209C2-15, NASM21209 | 10 | 90296A034 | 00000 | 91709A067 | 00000 | 91709A434 | 00000 | 90261A110 | 000000 | 92955A109 | 00000 | ||
Helical Threaded Inserts
 |
Pronged |
Restore, reinforce, or create threads in metal. The tough coils on these inserts expand once installed to anchor in a tapped hole. Also known as Heli-Coil inserts, they're often used in engine heads and machinery housings where strong connections are critical. Unlike threadlocking inserts, you can remove and reuse them without them losing their strength.
Installation requires a drill bit, a helical insert tap, and an installation tool.
Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
Inserts | Through-Hole Taps | Closed-End Hole Taps | Installation Tools | Prong Break-Off Tools | Inserts with Installation Tools | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | Each | Each | Each | Each | No. of Inserts Included | Each | ||||||||
Pronged | |||||||||||||||||||
18-8 Stainless Steel | |||||||||||||||||||
| 12-24 | 0.216" | 1 Ga. | 0.228" | 10 | 91732A021 | 00000 | 91709A067 | 000000 | 91709A434 | 000000 | 90261A110 | 0000000 | 92955A109 | 000000 | — | ——— | 0 | ||
| 12-24 | 0.324" | 1 Ga. | 0.228" | 10 | 91732A023 | 0000 | 91709A067 | 00000 | 91709A434 | 00000 | 90261A110 | 000000 | 92955A109 | 00000 | 10 | 91732A918 | 000000 | ||
| 12-24 | 0.432" | 1 Ga. | 0.228" | 10 | 91732A731 | 0000 | 91709A067 | 00000 | 91709A434 | 00000 | 90261A110 | 000000 | 92955A109 | 00000 | — | ——— | 0 | ||
