How to Install Helical Inserts
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About Helical Insert Length
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About Shaft Couplings
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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  | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
Nickel Alloy | ||||||||||||||
| 2-56 | 0.129" | No. 41 | 0.096" | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 |
| 6-32 | 0.138" | No. 25 | 0.1495" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| 10-24 | 0.19" | No. 5 | 0.2055" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 10-24 | 0.38" | No. 5 | 0.2055" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 10-32 | 0.285" | 13/64" | 13/64" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 1/4"-20 | 1/4" | H | 0.266" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 1/4"-20 | 3/8" | H | 0.266" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 5/16"-18 | 0.312" | Q | 0.332" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 5/16"-18 | 0.469" | Q | 0.332" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 5/16"-18 | 5/8" | Q | 0.332" | 1 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 3/8"-16 | 3/8" | X | 0.397" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 3/8"-16 | 0.562" | X | 0.397" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 3/8"-16 | 3/4" | X | 0.397" | 1 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
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 | |||||||||||||||
| M3 | 0.5 | 3 | 3.2 mm | 3.2 mm | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M3 | 0.5 | 6 | 3.2 mm | 3.2 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M4 | 0.7 | 4 | 4.25 mm | 4.25 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| M4 | 0.7 | 6 | 4.25 mm | 4.25 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| M4 | 0.7 | 8 | 4.25 mm | 4.25 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| M5 | 0.8 | 7.5 | 5.3 mm | 5.3 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M5 | 0.8 | 10 | 5.3 mm | 5.3 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M6 | 1 | 9 | 6.3 mm | 6.3 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M6 | 1 | 12 | 6.3 mm | 6.3 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 8 | 8.4 mm | 8.4 mm | 1 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 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 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M10 | 1.5 | 10 | 10.5 mm | 10.5 mm | 1 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M10 | 1.5 | 15 | 10.5 mm | 10.5 mm | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
High-Misalignment Precision Flexible Shaft Couplings
Specially designed ridges allow these bellows couplings to compensate for more misalignment than other precision couplings—useful for low-torque, high-precision applications such as instrumentation and motion control. They also allow zero backlash (no play) and never need lubrication. Couplings are nickel and stainless steel so they can be used in mildly corrosive environments. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.
For technical drawings and 3-D models, click on a part number.
Misalignment Capability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Overall Lg. | OD | Max. Speed | Max. Torque, in.-lbs. | Parallel | Angular | Axial | For Motion Type | Each | |
303 Stainless Steel and Nickel Alloy | ||||||||||
| 0.12" | 35/64" | 1/4" | Not Rated | 0.7 | 0.007" | 7° | 0.023" | Forward/Reverse, Start/Stop | 00000000 | 0000000 |
| 3/16" | 37/64" | 3/8" | Not Rated | 1.6 | 0.009" | 6° | 0.03" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/16" | 1 3/64" | 3/8" | Not Rated | 0.7 | 0.066" | 17° | 0.09" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" | 47/64" | 1/2" | Not Rated | 6.1 | 0.01" | 5° | 0.038" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" | 27/32" | 1/2" | Not Rated | 4.7 | 0.018" | 9° | 0.059" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" | 1 3/32" | 1/2" | Not Rated | 3.1 | 0.044" | 12° | 0.082" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" | 1 3/32" | 3/4" | Not Rated | 13.1 | 0.026" | 7° | 0.067" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" | 1 11/32" | 3/4" | Not Rated | 9.9 | 0.046" | 9° | 0.096" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5/16" | 1 1/8" | 1" | Not Rated | 26.3 | 0.02" | 5° | 0.067" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5/16" | 1 41/64" | 1" | Not Rated | 14.2 | 0.068" | 11° | 0.149" | Forward/Reverse, Start/Stop | 00000000 | 000000 |