System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Pitch Thread Pitch |
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Thread Type Thread Type |
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Material Material |
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Threaded Insert Type Threaded Insert Type |
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![]() | Helical |
For Maximum Hole Diameter For Maximum Hole Diameter |
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Drill Bit Size Drill Bit Size |
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Thread Spacing Thread Spacing |
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For Use In For Use In |
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End Type End Type |
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Passivation Passivation |
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Tensile Strength Tensile Strength |
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For Tap Type For Tap Type |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Specifications Met Specifications Met |
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Thread Direction Thread Direction |
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Helical Insert Style Helical Insert Style |
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Internal Locking Type Internal Locking Type |
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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 | |||||||||||||
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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 | |||||||||||||||||
M2.2 | 0.45 | Coarse | 2.2 | 2.35 mm | 2.35mm | SAE MA3279-100 | 5 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 |
M2.2 | 0.45 | Coarse | 3.3 | 2.35 mm | 2.35mm | SAE MA3279-150 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 |
M2.2 | 0.45 | Coarse | 4.4 | 2.35 mm | 2.35mm | SAE MA3279-200 | 5 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 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 | |||||||||||||
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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 | |||||||||||||||||
M2.2 | 0.45 | Coarse | 3.3 | 2.35 mm | 2.35mm | SAE MA3329-150 | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 |