System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Thread Type Thread Type |
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Material Material |
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For Minimum Material Thickness For MinimumMaterial Thickness |
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Tensile Strength Tensile Strength |
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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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Thread Direction Thread Direction |
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 | Right Hand |
For Tap Type For Tap Type |
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Specifications Met Specifications Met |
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Passivation Passivation |
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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.
Inserts that meet DIN 8140 adhere to international standards for dimensions.
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 | Thread Pitch, mm | Thread Spacing | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel—Right-Hand Threaded | |||||||||||||||||
| M8 | 1.25 | Coarse | 8 | 8.4 mm | 8.4mm | DIN 8140, MA-3279-109 | 10 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | Coarse | 12 | 8.4 mm | 8.4mm | DIN 8140, MA-3279-159 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | Coarse | 16 | 8.4 mm | 8.4mm | DIN 8140, MA-3279-209 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | Coarse | 20 | 8.4 mm | 8.4mm | DIN 8140, MA-3279-259 | 10 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | Coarse | 24 | 8.3 mm | 8.3mm | MA-3279-309 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1 | Fine | 8 | 8.3 mm | 8.3mm | DIN 8140, MA-3279-108 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1 | Fine | 12 | 8.3 mm | 8.3mm | DIN 8140, MA-3279-158 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1 | Fine | 16 | 8.3 mm | 8.3mm | DIN 8140, MA-3279-208 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Stainless Steel Helical Inserts
for Particle-Free Environments
Made of Nitronic 60 stainless steel, these inserts prevent the screw from binding or sticking without any coating or lubricant that could contaminate particle-free environments. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
Inserts that meet DIN 8140 adhere to international standards for dimensions.
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 | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
Nitronic 60 Stainless Steel | ||||||||||||||||
| M8 | 1.25 | 8 | 8.4 mm | 8.4mm | DIN 8140 | 5 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | 12 | 8.4 mm | 8.4mm | DIN 8140 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 16 | 8.4 mm | 8.4mm | DIN 8140 | 5 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Lubricated Stainless Steel Helical Inserts
A dry film keeps the screw from sticking or binding in these inserts during installation. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
Inserts that meet DIN 8140 adhere to international standards for dimensions.
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 | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel | ||||||||||||||||
| M8 | 1.25 | 8 | 8.4 mm | 8.4mm | MA-3280-109, MIL-I-8846 | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | 12 | 8.4 mm | 8.4mm | DIN 8140, MA-3280-159, MIL-I-8846 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 16 | 8.4 mm | 8.4mm | DIN 8140, MA-3280-209, MIL-I-8846 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Lubricated Stainless Steel Helical
Inserts for Dissimilar Metals
Eliminating the need for primer, these inserts are coated to resist corrosion when installed in different materials. They also prevent the screw from sticking or binding in the insert during installation. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
Inserts that meet DIN 8140 adhere to international standards for dimensions.
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 | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel | ||||||||||||||||
| M8 | 1.25 | 8 | 8.4 mm | 8.4mm | DIN 8140 | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | 12 | 8.4 mm | 8.4mm | DIN 8140 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 16 | 8.4 mm | 8.4mm | DIN 8140 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Nickel Alloy Helical Inserts
Made of nickel alloy, these inserts are more resistant to acids and salt water than stainless steel inserts. 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. 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 | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
Nickel Alloy | |||||||||||||||
| M8 | 1.25 | 8 | 8.4 mm | 8.4 mm | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | 12 | 8.4 mm | 8.4 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 16 | 8.4 mm | 8.4 mm | 1 | 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.
Inserts that meet DIN 8140 adhere to international standards for dimensions.
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 | Thread Pitch, mm | Thread Spacing | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel | |||||||||||||||||
| M8 | 1.25 | Coarse | 8 | 8.4 mm | 8.4mm | DIN 8140, MA-3329-109 | 10 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | Coarse | 12 | 8.4 mm | 8.4mm | DIN 8140, MA-3329-159 | 10 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | Coarse | 16 | 8.4 mm | 8.4mm | DIN 8140, MA-3329-209 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | Coarse | 20 | 8.4 mm | 8.4mm | MA-3329-259 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1 | Fine | 8 | 8.3 mm | 8.3mm | DIN 8140, MA-3329-108 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1 | Fine | 12 | 8.3 mm | 8.3mm | DIN 8140, MA-3329-158 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1 | Fine | 16 | 8.3 mm | 8.3mm | MA-3329-208 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Lubricated Stainless Steel Screw-Locking Helical Inserts
A dry film keeps the screw from sticking or binding in these inserts during installation, yet a distorted thread grips the screw to resist loosening. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
Inserts that meet DIN 8140 adhere to international standards for dimensions.
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 | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel | ||||||||||||||||
| M8 | 1.25 | 8 | 8.4 mm | 8.4mm | DIN 8140, MA-3330-109 | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M8 | 1.25 | 12 | 8.4 mm | 8.4mm | DIN 8140, MA-3330-159 | 5 | 000000000 | 0000 | 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 | Thread Pitch, mm | Thread Spacing | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M8 | 1.25 | Coarse | 8 | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 0000000 |
| M8 | 1.25 | Coarse | 12 | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
| M8 | 1.25 | Coarse | 16 | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
| M8 | 1 | Fine | 12 | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 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 | |
Metric | ||||||
|---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||
| M5×0.8 mm Thread × 7.5 mm Installed Lg. (12 Each) M6×1 mm Thread × 9 mm Installed Lg. (12 Each) M8×1.25 mm Thread × 12 mm Installed Lg. (12 Each) M10×1.5 mm Thread × 15 mm Installed Lg. (12 Each) Drill Bits Through-Hole Taps Installation Tools | 48 | Coarse | 13/64" 1/4" 21/64" 13/32" | 13/64" 1/4" 21/64" 13/32" | 000000000 | 0000000 |
| M8×1.25 mm Thread × 8 mm Installed Lg. (6 Each) M8×1.25 mm Thread × 12 mm Installed Lg. (6 Each) M8×1.25 mm Thread × 16 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool | 18 | Coarse | 21/64" | 21/64" | 000000000 | 00000 |