How to Install Helical Inserts
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About Helical Insert Length
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About Nuts, Materials, and Finishes
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About Thumb Screw and Binding Post Materials
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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 | 0000000 |
| 12-24 | 0.324" | No. 1 | 0.228" | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 12-24 | 0.432" | No. 1 | 0.228" | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
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 | 0000000 |
| 12-24 | 0.324" | No. 1 | 0.228" | MS21209C2-15, NASM21209 | 10 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
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 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.
Steel Low-Profile Rivet Nuts with Installation Tool
Everything you need to add threads to sheet metal in low-clearance areas. Along with low-profile rivet nuts, these kits include mandrels and an installation tool. As you install these nuts, the threaded portion is drawn into the sleeve, reducing how far they stick out the back of your material. They also have a flange that’s half as thick as those on other rivet nuts, so they have a low profile on both sides of your panel. A tin-zinc plating protects from rust in wet environments and reduces friction, so they collapse smoothly. These rivet nuts create permanent threads in surfaces that are too thin to be tapped. Installation requires access to just one side of your material. The flange distributes the load and holds them against the surface.
To install, thread a rivet nut onto the mandrel, insert the nut into a drilled or punched round hole, push down on the tool's T-handle, and turn clockwise.
| Thread Size | For Material Thick. | Includes | No. of Nuts Included | Each | |
Tin-Zinc Plated Steel | |||||
|---|---|---|---|---|---|
| 12-24 | 0.03" to 0.09" | Mandrels, Installation Tool | 100 | 000000000 | 0000000 |
Steel Press-Fit Nuts for Sheet Metal
Add permanent threads to sheet metal, like weld nuts, but without the setup and mess. A zinc plating on these steel press-fit nuts helps prevent rust in wet environments. Also known as clinch-style captive nuts, press them into a drilled or punched hole with an arbor press or similar pressure tool. The pressure forms your sheet metal into the knurls of the nut, making the nut inseparable from the sheet. Installation requires access to both sides of the panel.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Drill Bit Size | For Min. Panel Thick. | For Max. Panel Hardness | OD | Ht. | PEM® Part No. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
| 12-24 | J | 0.04" | Brinell 150, Rockwell B80 | 0.37" | 0.13" | S-1224-1ZI | 10 | 000000000 | 00000 |
| 12-24 | J | 0.056" | Brinell 150, Rockwell B80 | 0.37" | 0.13" | __ | 10 | 000000000 | 0000 |
| 12-24 | J | 0.09" | Brinell 150, Rockwell B80 | 0.37" | 0.13" | S-1224-3ZI | 10 | 000000000 | 0000 |
Stainless Steel Press-Fit Nuts for Sheet Metal
Create permanent, corrosion-resistant threads in sheet metal without the setup and mess of weld nuts. Made of 18-8 stainless steel, these press-fit nuts withstand water and mild chemicals better than zinc-plated steel nuts. Also known as clinch-style captive nuts, press them into a drilled or punched hole with an arbor press or similar pressure tool. The pressure forms your sheet metal into the knurls of the nut, making the nut inseparable from the sheet. Installation requires access to both sides of the panel.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Drill Bit Size | For Min. Panel Thick. | For Max. Panel Hardness | OD | Ht. | PEM® Part No. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
| 12-24 | J | 0.04" | Brinell 125, Rockwell B70 | 0.37" | 0.13" | CLS-1224-1 | 5 | 000000000 | 00000 |
| 12-24 | J | 0.056" | Brinell 125, Rockwell B70 | 0.37" | 0.13" | CLS-1224-2 | 10 | 000000000 | 0000 |
| 12-24 | J | 0.09" | Brinell 125, Rockwell B70 | 0.37" | 0.13" | CLS-1224-3 | 10 | 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.
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
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 |
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 |
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 | 0000000 |
Threaded-Shank Phillips Bits
Thread these bits directly into your driving tool for minimal wobble in assembly applications.
For technical drawings and 3-D models, click on a part number.
Hand-Driven Tools for Low-Profile Rivet Nuts
Turn these tools by hand to install low-profile rivet nuts. The required mandrels are sold separately. To use, thread the nut onto a mandrel of the same size, then place it into a hole, push down on the tool's T-handle, and turn clockwise.
| For Thread Size | For Rivet Nut Body Type | For Rivet Nut Material | Overall Lg. | Each | |
| 4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, M3, M4, M5, M6, M8, M10 | Sleeve | 18-8 Stainless Steel, Aluminum, Steel | 5 7/8" | 000000000 | 0000000 |
| For Thread Size | Each | |
| 4-40 | 000000000 | 000000 |
| 6-32 | 000000000 | 00000 |
| 8-32 | 000000000 | 00000 |
| 10-24 | 000000000 | 00000 |
| 10-32 | 000000000 | 00000 |
| 12-24 | 000000000 | 00000 |
| 1/4"-20 | 000000000 | 00000 |
| 1/4"-28 | 000000000 | 00000 |
| 5/16"-18 | 000000000 | 00000 |
| 5/16"-24 | 000000000 | 00000 |
| 3/8"-16 | 000000000 | 00000 |
| 3/8"-24 | 000000000 | 00000 |
| M3 × 0.5 mm | 000000000 | 00000 |
| M4 × 0.7 mm | 000000000 | 00000 |
| M5 × 0.8 mm | 000000000 | 00000 |
| M6 × 1 mm | 000000000 | 00000 |
| M8 × 1.25 mm | 000000000 | 00000 |
| M10 × 1.5 mm | 000000000 | 00000 |
Wrench-Driven Rivet Nut Tools
Use these tools to install most styles of rivet nuts. A wrench and ratchet are required to hold the tool and tighten the nut.
For technical drawings and 3-D models, click on a part number.
| For Thread Size | For Wrench Size | For Ratchet Size | For Rivet Nut Body Type | For Rivet Nut Material | Each | |
| 12-24 | 7/8" | 11/16" | Smooth, Ribbed, Hex, Bulbed, Sleeve | 18-8 Stainless Steel, Aluminum, Steel, Titanium | 000000000 | 000000 |