Steel Unthreaded Inserts for Plastic
A zinc-plated finish gives these steel inserts mild corrosion resistance. Also known as compression limiters, they keep screws securely installed even if the surrounding plastic expands or shrinks when the screw is tightened.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | Lg. | Lg. Tolerance | OD | OD Tolerance | For Hole Dia. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 8 | 3/8" | -0.006" to 0.000" | 0.269" | -0.004" to 0.000" | 0.259"-0.263" | 25 | 000000000 | 000000 |
| No. 8 | 1/2" | -0.006" to 0.000" | 0.269" | -0.004" to 0.000" | 0.259"-0.263" | 25 | 000000000 | 0000 |
| No. 10 | 3/8" | -0.006" to 0.000" | 0.311" | -0.006" to 0.000" | 0.299"-0.303" | 25 | 000000000 | 00000 |
| No. 10 | 1/2" | -0.006" to 0.000" | 0.311" | -0.006" to 0.000" | 0.299"-0.303" | 25 | 000000000 | 00000 |
| No. 10 | 5/8" | -0.006" to 0.000" | 0.311" | -0.006" to 0.000" | 0.299"-0.303" | 10 | 000000000 | 0000 |
| 1/4" | 3/8" | -0.006" to 0.000" | 0.381" | -0.007" to 0.000" | 0.368"-0.372" | 25 | 000000000 | 00000 |
| 1/4" | 1/2" | -0.006" to 0.000" | 0.381" | -0.007" to 0.000" | 0.368"-0.372" | 25 | 000000000 | 00000 |
| 1/4" | 5/8" | -0.006" to 0.000" | 0.381" | -0.007" to 0.000" | 0.368"-0.372" | 10 | 000000000 | 0000 |
| 1/4" | 3/4" | -0.006" to 0.000" | 0.381" | -0.007" to 0.000" | 0.368"-0.372" | 25 | 000000000 | 00000 |
| 5/16" | 3/8" | -0.008" to 0.000" | 0.48" | -0.012" to 0.000" | 0.462"-0.466" | 25 | 000000000 | 00000 |
| 5/16" | 1/2" | -0.008" to 0.000" | 0.48" | -0.012" to 0.000" | 0.462"-0.466" | 25 | 000000000 | 00000 |
| 5/16" | 3/4" | -0.008" to 0.000" | 0.48" | -0.012" to 0.000" | 0.462"-0.466" | 10 | 000000000 | 00000 |
| 5/16" | 1" | -0.010" to 0.000" | 0.48" | -0.012" to 0.000" | 0.462"-0.466" | 5 | 000000000 | 0000 |
| 3/8" | 3/8" | -0.010" to 0.000" | 0.574" | -0.016" to 0.000" | 0.552"-0.556" | 10 | 000000000 | 00000 |
| 3/8" | 1/2" | -0.010" to 0.000" | 0.574" | -0.016" to 0.000" | 0.552"-0.556" | 10 | 000000000 | 00000 |
| 3/8" | 5/8" | -0.006" to 0.000" | 0.574" | -0.016" to 0.000" | 0.552"-0.556" | 5 | 000000000 | 0000 |
| 3/8" | 3/4" | -0.010" to 0.000" | 0.574" | -0.016" to 0.000" | 0.552"-0.556" | 5 | 000000000 | 00000 |
| 3/8" | 1" | -0.010" to 0.000" | 0.574" | -0.016" to 0.000" | 0.552"-0.556" | 5 | 000000000 | 0000 |
| 3/8" | 1 1/4" | -0.010" to 0.010" | 0.574" | -0.016" to 0.000" | 0.552"-0.556" | 5 | 000000000 | 00000 |
| M4 | 8mm | -0.150mm to 0.000mm | 6.75mm | -0.100mm to 0.000mm | 6.5mm-6.6mm | 25 | 000000000 | 00000 |
| M4 | 12mm | -0.150mm to 0.000mm | 6.75mm | -0.100mm to 0.000mm | 6.5mm-6.6mm | 25 | 000000000 | 00000 |
| M5 | 8mm | -0.150mm to 0.000mm | 8.1mm | -0.150mm to 0.000mm | 7.8mm-7.9mm | 10 | 000000000 | 0000 |
| M5 | 10mm | -0.150mm to 0.000mm | 8.1mm | -0.150mm to 0.000mm | 7.8mm-7.9mm | 10 | 000000000 | 0000 |
| M5 | 12mm | -0.150mm to 0.000mm | 8.1mm | -0.150mm to 0.000mm | 7.8mm-7.9mm | 10 | 000000000 | 0000 |
| M5 | 15mm | -0.150mm to 0.000mm | 8.1mm | -0.150mm to 0.000mm | 7.8mm-7.9mm | 10 | 000000000 | 0000 |
| M6 | 10mm | -0.150mm to 0.000mm | 9.33mm | -0.180mm to 0.000mm | 9mm-9.1mm | 10 | 000000000 | 0000 |
| M6 | 12mm | -0.150mm to 0.000mm | 9.33mm | -0.180mm to 0.000mm | 9mm-9.1mm | 10 | 000000000 | 0000 |
| M6 | 15mm | -0.150mm to 0.000mm | 9.33mm | -0.180mm to 0.000mm | 9mm-9.1mm | 10 | 000000000 | 0000 |
| M6 | 20mm | -0.150mm to 0.000mm | 9.33mm | -0.180mm to 0.000mm | 9mm-9.1mm | 10 | 000000000 | 0000 |
| M8 | 10mm | -0.200mm to 0.000mm | 12.2mm | -0.300mm to 0.000mm | 11.75mm-11.85mm | 5 | 000000000 | 0000 |
| M8 | 12mm | -0.200mm to 0.000mm | 12.2mm | -0.300mm to 0.000mm | 11.75mm-11.85mm | 5 | 000000000 | 0000 |
| M8 | 15mm | -0.200mm to 0.000mm | 12.2mm | -0.300mm to 0.000mm | 11.75mm-11.85mm | 5 | 000000000 | 0000 |
| M8 | 20mm | -0.200mm to 0.000mm | 12.2mm | -0.300mm to 0.000mm | 11.75mm-11.85mm | 5 | 000000000 | 0000 |
| M8 | 25mm | -0.200mm to 0.000mm | 12.2mm | -0.300mm to 0.000mm | 11.75mm-11.85mm | 5 | 000000000 | 0000 |
| M10 | 10mm | -0.250mm to 0.000mm | 15.07mm | -0.420mm to 0.000mm | 14.5mm-14.6mm | 5 | 000000000 | 0000 |
| M10 | 15mm | -0.250mm to 0.000mm | 15.07mm | -0.420mm to 0.000mm | 14.5mm-14.6mm | 5 | 000000000 | 0000 |
| M10 | 20mm | -0.250mm to 0.000mm | 15.07mm | -0.420mm to 0.000mm | 14.5mm-14.6mm | 5 | 000000000 | 0000 |
Aluminum Unthreaded Inserts for Plastic
These aluminum inserts are lightweight, nonmagnetic, and mildly corrosion resistant. Also known as compression limiters, they keep screws securely installed even if the surrounding plastic expands or shrinks when the screw is tightened.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | Lg. | Lg. Tolerance | OD | OD Tolerance | For Hole Dia. | Pkg. Qty. | Pkg. | |
Aluminum | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 4 | 1/8" | -0.006" to 0.000" | 0.219" | -0.006" to 0.000" | 0.221"-0.224" | 10 | 000000000 | 000000 |
| No. 4 | 0.187" | -0.006" to 0.000" | 0.219" | -0.006" to 0.000" | 0.221"-0.224" | 10 | 000000000 | 00000 |
| No. 6 | 1/8" | -0.006" to 0.000" | 0.255" | -0.006" to 0.000" | 0.256"-0.259" | 10 | 000000000 | 00000 |
| No. 6 | 1/4" | -0.006" to 0.000" | 0.255" | -0.006" to 0.000" | 0.256"-0.259" | 5 | 000000000 | 0000 |
| No. 8 | 0.156" | -0.006" to 0.000" | 0.28" | -0.006" to 0.000" | 0.281"-0.284" | 10 | 000000000 | 00000 |
| No. 8 | 1/4" | -0.006" to 0.000" | 0.28" | -0.006" to 0.000" | 0.281"-0.284" | 5 | 000000000 | 0000 |
| No. 10 | 0.187" | -0.006" to 0.000" | 0.34" | -0.006" to 0.000" | 0.341"-0.344" | 5 | 000000000 | 0000 |
| No. 10 | 1/4" | -0.006" to 0.000" | 0.34" | -0.006" to 0.000" | 0.341"-0.344" | 5 | 000000000 | 0000 |
| 1/4" | 1/4" | -0.006" to 0.000" | 0.4" | -0.006" to 0.000" | 0.401"-0.404" | 5 | 000000000 | 0000 |
| 1/4" | 0.312" | -0.006" to 0.000" | 0.4" | -0.006" to 0.000" | 0.401"-0.404" | 5 | 000000000 | 0000 |
Brass Unthreaded Inserts for Plastic
Made from brass, these inserts are nonmagnetic, mildly corrosion resistant, and electrically conductive. Also known as compression limiters, they keep screws securely installed even if the surrounding plastic expands or shrinks when the screw is tightened.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | Lg. | Lg. Tolerance | OD | OD Tolerance | For Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 4 | 1/8" | -0.006" to 0.000" | 0.244" | 0.000" to 0.006" | 0.245"-0.248" | 10 | 000000000 | 000000 |
| No. 4 | 0.187" | -0.006" to 0.000" | 0.244" | 0.000" to 0.006" | 0.245"-0.248" | 5 | 000000000 | 0000 |
| No. 6 | 1/8" | -0.006" to 0.000" | 0.268" | 0.000" to 0.006" | 0.269"-0.272" | 10 | 000000000 | 00000 |
| No. 6 | 1/4" | -0.006" to 0.000" | 0.268" | 0.000" to 0.006" | 0.269"-0.272" | 5 | 000000000 | 0000 |
| No. 8 | 0.156" | -0.006" to 0.000" | 0.304" | 0.000" to 0.006" | 0.305"-0.308" | 5 | 000000000 | 0000 |
| No. 8 | 1/4" | -0.006" to 0.000" | 0.304" | 0.000" to 0.006" | 0.305"-0.308" | 5 | 000000000 | 0000 |
| No. 10 | 0.187" | -0.006" to 0.000" | 0.364" | 0.000" to 0.006" | 0.365"-0.368" | 5 | 000000000 | 0000 |
| No. 10 | 1/4" | -0.006" to 0.000" | 0.364" | 0.000" to 0.006" | 0.365"-0.368" | 5 | 000000000 | 0000 |
| 1/4" | 1/4" | -0.006" to 0.000" | 0.436" | 0.000" to 0.006" | 0.437"-0.44" | 5 | 000000000 | 0000 |
| 1/4" | 0.312" | -0.006" to 0.000" | 0.436" | 0.000" to 0.006" | 0.437"-0.44" | 5 | 000000000 | 0000 |
Unthreaded Inserts for Metal
Protect bolts from sideways (shear) pressure. Made of zinc-plated steel, they have mild corrosion resistance. The ends are beveled to make insertion easier.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | Lg. | Lg. Tolerance | OD | OD Tolerance | For Hole Dia. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4" | 1/2" | -0.030" to 0.000" | 0.335" | -0.010" to 0.000" | 0.315"-0.32" | 25 | 000000000 | 00000 |
| 1/4" | 3/4" | -0.030" to 0.000" | 0.335" | -0.010" to 0.000" | 0.315"-0.32" | 25 | 000000000 | 00000 |
| 1/4" | 1" | -0.030" to 0.000" | 0.335" | -0.010" to 0.000" | 0.315"-0.32" | 10 | 000000000 | 0000 |
| 5/16" | 1/2" | -0.030" to 0.000" | 0.411" | -0.010" to 0.000" | 0.391"-0.396" | 10 | 000000000 | 0000 |
| 5/16" | 3/4" | -0.030" to 0.000" | 0.411" | -0.010" to 0.000" | 0.391"-0.396" | 10 | 000000000 | 0000 |
| 5/16" | 1" | -0.030" to 0.000" | 0.411" | -0.010" to 0.000" | 0.391"-0.396" | 10 | 000000000 | 0000 |
| 3/8" | 3/4" | -0.030" to 0.000" | 0.489" | -0.010" to 0.000" | 0.469"-0.474" | 10 | 000000000 | 0000 |
| 3/8" | 1" | -0.030" to 0.000" | 0.489" | -0.010" to 0.000" | 0.469"-0.474" | 10 | 000000000 | 00000 |
| 3/8" | 1 1/4" | -0.030" to 0.000" | 0.489" | -0.010" to 0.000" | 0.469"-0.474" | 5 | 000000000 | 0000 |
| 1/2" | 1" | -0.030" to 0.000" | 0.65" | -0.010" to 0.000" | 0.63"-0.635" | 5 | 000000000 | 0000 |
| 1/2" | 1 1/4" | -0.030" to 0.000" | 0.65" | -0.010" to 0.000" | 0.63"-0.635" | 5 | 000000000 | 0000 |
| 1/2" | 1 1/2" | -0.030" to 0.000" | 0.65" | -0.010" to 0.000" | 0.63"-0.635" | 1 | 000000000 | 0000 |