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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.
Inch
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 | |||||||||||||||
| 2-56 | 0.086" | No. 41 | 0.096" | MIL-I-8846, MS122-095 | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 |
| 2-56 | 0.129" | No. 41 | 0.096" | MIL-I-8846, MS122-135 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 |
| 2-56 | 0.172" | No. 41 | 0.096" | MIL-I-8846, MS122-175 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 |
| 4-40 | 0.112" | No. 31 | 0.12" | MIL-I-8846, MS122-076 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 4-40 | 0.168" | No. 31 | 0.12" | MIL-I-8846, MS122-116 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 4-40 | 0.224" | No. 31 | 0.12" | MIL-I-8846, MS122-156 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 6-32 | 0.138" | No. 25 | 0.1495" | MIL-I-8846, MS122-078 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| 6-32 | 0.207" | No. 25 | 0.1495" | MIL-I-8846, MS122-118 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| 6-32 | 0.276" | No. 25 | 0.1495" | MIL-I-8846, MS122-158 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| 10-24 | 0.285" | No. 5 | 0.2055" | MIL-I-8846, MS122-120 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 10-32 | 0.19" | 13/64" | 13/64" | MIL-I-8846, MS124-655 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 10-32 | 0.285" | 13/64" | 13/64" | MIL-I-8846, MS124-695 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 10-32 | 0.38" | 13/64" | 13/64" | MIL-I-8846, MS124-735 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 1/4"-20 | 1/4" | H | 0.266" | MIL-I-8846, MS122-081 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 1/4"-20 | 3/8" | H | 0.266" | MIL-I-8846, MS122-121 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 1/4"-20 | 1/2" | H | 0.266" | MIL-I-8846, MS122-161 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 5/16"-18 | 0.312" | Q | 0.332" | MIL-I-8846, MS120-082 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 5/16"-18 | 0.469" | Q | 0.332" | MIL-I-8846, MS122-121 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 5/16"-18 | 5/8" | Q | 0.332" | MIL-I-8846, MS122-162 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Metric
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 | ||||||||||||||||
| M2.5 | 0.45 | 2.5 | No. 37 | 0.104" | DIN 8140, MIL-I-8846, SAE MA3280-101 | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
| M2.5 | 0.45 | 5 | No. 37 | 0.104" | DIN 8140, MIL-I-8846, SAE MA3280-201 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M3 | 0.5 | 3 | 3.2 mm | 3.2mm | DIN 8140, MIL-I-8846, SAE MA3280-102 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M3 | 0.5 | 4.5 | 3.2 mm | 3.2mm | DIN 8140, MIL-I-8846, SAE MA3280-152 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M3 | 0.5 | 6 | 3.2 mm | 3.2mm | DIN 8140, MIL-I-8846, SAE MA3280-202 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M4 | 0.7 | 4 | No. 19 | 0.166" | DIN 8140, MIL-I-8846, SAE MA3280-104 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| M4 | 0.7 | 6 | No. 19 | 0.166" | DIN 8140, MIL-I-8846, SAE MA3280-154 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| M4 | 0.7 | 8 | No. 19 | 0.166" | DIN 8140, MIL-I-8846, SAE MA3280-204 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 00000 |
| M5 | 0.8 | 5 | 5.3 mm | 5.3mm | DIN 8140, MIL-I-8846, SAE MA3280-105 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M5 | 0.8 | 7.5 | 5.3 mm | 5.3mm | DIN 8140, MIL-I-8846, SAE MA3280-155 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M6 | 1 | 6 | 6.3 mm | 6.3mm | DIN 8140, MIL-I-8846, SAE MA3280-106 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M6 | 1 | 9 | 6.3 mm | 6.3mm | DIN 8140, MIL-I-8846, SAE MA3280-156 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M6 | 1 | 12 | 6.3 mm | 6.3mm | DIN 8140, MIL-I-8846, SAE MA3280-206 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 8 | 8.4 mm | 8.4mm | MIL-I-8846, SAE MA3280-109 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 12 | 8.4 mm | 8.4mm | DIN 8140, MIL-I-8846, SAE MA3280-159 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| M8 | 1.25 | 16 | 8.4 mm | 8.4mm | DIN 8140, MIL-I-8846, SAE MA3280-209 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |