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About Thumb Screw and Binding Post Materials
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About Nuts, Materials, and Finishes
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How to Install Helical Inserts
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About Helical Insert Length
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Stainless Steel Helical Inserts

Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
For technical drawings and 3-D models, click on a part number.
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. | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel—Right-Hand Threaded | ||||||||||||||
12-24 | 0.216" | No. 1 | 0.228" | 10 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 000000 |
12-24 | 0.324" | No. 1 | 0.228" | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
12-24 | 0.432" | No. 1 | 0.228" | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
Stainless Steel Screw-Locking Helical Inserts

A distorted thread grips the screw to resist loosening. Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
For technical drawings and 3-D models, click on a part number.
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. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel | |||||||||||||||
12-24 | 0.216" | No. 1 | 0.228" | MS21209C2-10, NASM21209 | 10 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 000000 |
12-24 | 0.324" | No. 1 | 0.228" | MS21209C2-15, NASM21209 | 10 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
Helical Inserts with Installation Tools

Inserts come with a through-hole tap and installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||
---|---|---|---|---|---|---|---|
12-24 | 0.324" | 15/64" | 15/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
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. Also known as Heli-Coil inserts, the inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Includes | No. of Inserts Included | Thread Spacing | Drill Bit Size | For Max. Hole Dia. | Each | |
Inch | ||||||
---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||
Prong Break-Off Tool 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 Through-Hole Tap Installation Tool | 36 | Coarse | 15/64" | 15/64" | 000000000 | 000000 |
Steel Press-Fit Nuts for Sheet Metal
Also known as clinch style captive nuts, press these into a drilled or punched hole with an arbor press or similar pressure tool. Installation requires access to both sides of the panel. Knurls on the bottom of the nut hold them firmly in place. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Stainless Steel Press-Fit Nuts for Sheet Metal

These nuts have good chemical resistance and may be mildly magnetic. Also known as clinch style captive nuts, press them into a drilled or punched hole with an arbor press or similar pressure tool. Installation requires access to both sides of the panel. Knurls on the bottom of the nut hold them firmly in place.
For technical drawings and 3-D models, click on a part number.
Steel Low-Profile Rivet Nuts

These steel low-profile rivet nuts are about twice as strong as aluminum rivet nuts. They have a low profile for light duty fastening in low-clearance applications. A cadmium or tin-zinc plating provides corrosion resistance and adds lubricity so they collapse smoothly. The threaded portion is drawn into the sleeve when installed, creating pressure against the hole to secure the nut. Drill bit size listed in the table is for material with a 0.030"-0.090" thickness. These rivet nuts may be installed in thicker material, but may require larger holes. Install them using a hand- or power-driven rivet nut tool. Length is measured from under the flange. Installed length is the maximum length of the barrel when installed.
For technical drawings and 3-D models, click on a part number.
Brass Binding Barrels and Screws for Door Hardware

Brass binding barrels and screws are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Use them to anchor door closers, kickplates, and other architectural hardware. The barrel head is smooth with no drive to be tampered with on the outside of your door, and the screw has a flat head that sits flush with the surface for a finished look. The screw protrudes from the barrel to leave room for hardware. Install in a hole with a diameter equal to the barrel diameter. Barrel length and screw length are measured from under the head.
For technical drawings and 3-D models, click on a part number.
Barrel | Screw | ||||||||||||
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For Material Thick. | Lg. | Dia. | Head Dia. | Head Ht. | Thread Dp. | Lg. | Head Dia. | Head Ht. | Drive Size | Countersink Angle | Appearance | Each | |
Brass | |||||||||||||
12-24 | |||||||||||||
1 3/8" | 1 3/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 1/8" | No. 3 | 82° | Dull | 000000000 | 00000 |
1 3/4" | 1 9/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 1/8" | No. 3 | 82° | Dull | 000000000 | 0000 |
Chrome-Plated Brass | |||||||||||||
12-24 | |||||||||||||
1 3/8" | 1 3/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 1/8" | No. 3 | 82° | Polished | 000000000 | 0000 |
1 3/4" | 1 9/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 1/8" | No. 3 | 82° | Polished | 000000000 | 0000 |
Bronze-Plated Brass | |||||||||||||
12-24 | |||||||||||||
1 3/8" | 1 3/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 9/64" | No. 3 | 82° | Dark | 000000000 | 0000 |
1 3/4" | 1 9/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 9/64" | No. 3 | 82° | Dark | 000000000 | 0000 |
18-8 Stainless Steel Binding Barrels and Screws for Door Hardware

Made from 18-8 stainless steel, these binding barrels and screws are chemical resistant and may be mildly magnetic. Use them to anchor door closers, kickplates, and other architectural hardware. The barrel head is smooth with no drive to be tampered with on the outside of your door, and the screw has a flat head that sits flush with the surface for a finished look. The screw protrudes from the barrel to leave room for hardware. Install in a hole with a diameter equal to the barrel diameter. Barrel length and screw length are measured from under the head.
For technical drawings and 3-D models, click on a part number.
Installation Tools for Helical Inserts

Screw an insert onto these tools and drive them a quarter to half-turn below the material’s surface. They’re compatible with helical inserts that have a prong.
For technical drawings and 3-D models, click on a part number.

For Thread Size | Style | Each | |
For Right-Hand Thread | |||
---|---|---|---|
12-24 | E | 000000000 | 0000000 |
Prong Break-Off Tools for Helical Inserts

Place the tip of these tools into installed inserts and push down to trigger the spring-loaded punch to break off the prong.
For technical drawings and 3-D models, click on a part number.
For Thread Size | Each | |
10-24, 10-32, 12-24 | 000000000 | 000000 |
Extraction Tools for Helical Inserts

Place the tip of these tools into an insert and strike a light blow to the tool’s head. Then turn the tools counterclockwise with pressure to extract the insert.
For Thread Size | Each | |
10-24, 10-32, 12-24, 12-28, 1/4"-20, 1/4"-28, 1/4"-32, 1/4"-80, 5/16"-18, 5/16"-24, 5/16"-32, 3/8"-16, 3/8"-24, M5, M6, M7, M8, M10 | 000000000 | 000000 |
Threaded-Shank Phillips Bits


Thread these bits directly into your driving tool for minimal wobble in assembly applications.