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For Helical Insert Style For Helical Insert Style |
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Threaded Insert Type Threaded Insert Type |
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 | Helical |
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Specifications Met Specifications Met |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Helical Insert Style Helical Insert Style |
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For Maximum Hole Diameter For Maximum Hole Diameter |
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For Use In For Use In |
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Nut Type Nut Type |
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 | Socket Head |
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Thread Spacing Thread Spacing |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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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. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel—Right-Hand Threaded | |||||||||||||||
| 5-40 | 1/8" | No. 29 | 0.136" | MS122-077 | 10 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 000000 |
| 5-40 | 0.188" | No. 29 | 0.136" | MS122-117 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| 5-40 | 1/4" | No. 29 | 0.136" | MS122-157 | 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 | |||||||||||||||
| 5-40 | 1/8" | No. 29 | 0.136" | MS21209C0510, NASM21209 | 10 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 000000 |
| 5-40 | 0.188" | No. 29 | 0.136" | MS21209C0515, NASM21209 | 10 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| 5-40 | 1/4" | No. 29 | 0.136" | MS21209C0520, NASM21209 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
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 5-40 Thread × 1/8" Installed Lg. (12 Each) 5-40 Thread × 0.188" Installed Lg. (12 Each) 5-40 Thread × 1/4" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool | 36 | Coarse | No. 29 | 0.136" | 000000000 | 0000000 |
Stainless Steel Socket Nuts
These nuts are chemical resistant and may be mildly magnetic. Also known as Allen nuts, use them with socket head cap screws in recessed holes and tight spaces that don't have enough clearance for a wrench. Tighten them with a 6-point hex key. They can also be used as an insert by pressing or drawing them into nonhardened steel, cast iron, or soft nonferrous metal or by molding them into plastic, ceramic, fiber, and similar materials.
For technical drawings and 3-D models, click on a part number.
| Thread Size | OD | Ht. | Threading | Thread Dp. | For Hole Dia. | Hex Key Size | Each | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 5-40 | 0.19" | 0.21" | Partially Threaded | 0.1" | 0.202" | 1/8" | 000000000 | 00000 |
Alloy Steel Socket Nuts
Also known as Allen nuts, use these with socket head cap screws in recessed holes and tight spaces that don't have enough clearance for a wrench. Tighten them with a 6-point hex key. They can also be used as an insert by pressing or drawing them into nonhardened steel, cast iron, or soft nonferrous metal or by molding them into plastic, ceramic, fiber, and similar materials. Made from alloy steel, they're comparable in strength to Grade 9 bolts.
For technical drawings and 3-D models, click on a part number.
| Thread Size | OD | Ht. | Threading | Thread Dp. | For Hole Dia. | Hex Key Size | Each | |
Alloy Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 5-40 | 0.18" | 0.2" | Partially Threaded | 0.1" | 0.202" | 1/8" | 000000000 | 00000 |
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 | |||
|---|---|---|---|
| 5-40 | 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 | |
| 4-40, 4-48, 5-40 | 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 | |
| 3-48, 3-56, 4-40, 4-48, 5-40, 5-44, 6-32, 6-40, 8-32, 8-36, 8-40, M2.5, M3, M3.5, M4 | 000000000 | 000000 |