Brass Screw-to-Expand Inserts for Plastic
Made from brass, these inserts are electrically conductive, nonmagnetic, and have good corrosion resistance. Press them into a drilled hole, then install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it secure.
For technical drawings and 3-D models, click on a part number.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | ||||||
|---|---|---|---|---|---|---|
| 0-80 | 1/8" | 3/32" | 3/32" | 25 | 000000000 | 000000 |
| 2-56 | 0.156" | 1/8" | 1/8" | 50 | 000000000 | 00000 |
| 4-40 | 0.188" | 5/32" | 5/32" | 50 | 000000000 | 00000 |
| 4-40 | 1/4" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 6-32 | 1/4" | 3/16" | 3/16" | 50 | 000000000 | 00000 |
| 6-32 | 5/16" | 3/16" | 3/16" | 25 | 000000000 | 0000 |
| 8-32 | 1/4" | 7/32" | 7/32" | 25 | 000000000 | 0000 |
| 8-32 | 5/16" | 7/32" | 7/32" | 50 | 000000000 | 00000 |
| 10-24 | 3/8" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 10-32 | 1/4" | 1/4" | 1/4" | 25 | 000000000 | 0000 |
| 10-32 | 3/8" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 1/4"-20 | 1/2" | 5/16" | 5/16" | 25 | 000000000 | 00000 |
| 5/16"-18 | 0.563" | 3/8" | 3/8" | 10 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 7/16" | 7/16" | 10 | 000000000 | 0000 |
| Thread Size | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | |||||||
|---|---|---|---|---|---|---|---|
| M2 | 0.4 | 4 | 3.2 mm | 3.2 mm | 10 | 000000000 | 00000 |
| M2.5 | 0.45 | 4.8 | 4 mm | 4 mm | 10 | 000000000 | 0000 |
| M3 | 0.5 | 4.8 | 4 mm | 4 mm | 50 | 000000000 | 00000 |
| M3 | 0.5 | 6.4 | 4 mm | 4 mm | 25 | 000000000 | 0000 |
| M3.5 | 0.6 | 6.4 | 4.8 mm | 4.8 mm | 50 | 000000000 | 00000 |
| M4 | 0.7 | 6.4 | 5.6 mm | 5.6 mm | 25 | 000000000 | 0000 |
| M4 | 0.7 | 8 | 5.6 mm | 5.6 mm | 25 | 000000000 | 0000 |
| M5 | 0.8 | 9.5 | 6.4 mm | 6.4 mm | 25 | 000000000 | 0000 |
| M6 | 1 | 12.7 | 8 mm | 8 mm | 25 | 000000000 | 00000 |
| M8 | 1.25 | 12.7 | 9.5 mm | 9.5 mm | 1 | 000000000 | 0000 |
18-8 Stainless Steel Screw-to-Expand Inserts for Plastic
These 18-8 stainless steel inserts have good corrosion resistance and may be mildly magnetic. Press them into a drilled hole, then install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it secure.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| 2-56 | 5/32" | 1/8" | 1/8" | 10 | 000000000 | 00000 |
| 4-40 | 3/16" | 5/32" | 5/32" | 10 | 000000000 | 0000 |
| 6-32 | 1/4" | 3/16" | 3/16" | 10 | 000000000 | 0000 |
| 8-32 | 5/16" | 7/32" | 7/32" | 5 | 000000000 | 0000 |
| 10-24 | 3/8" | 1/4" | 1/4" | 5 | 000000000 | 0000 |
| 10-32 | 3/8" | 1/4" | 1/4" | 5 | 000000000 | 0000 |
| 1/4"-20 | 1/2" | 5/16" | 5/16" | 5 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 3/8" | 3/8" | 5 | 000000000 | 00000 |
| 3/8"-16 | 5/8" | 7/16" | 7/16" | 1 | 000000000 | 0000 |
Aluminum Screw-to-Expand Inserts for Plastic
These aluminum inserts are 70% lighter than brass inserts, electrically conductive, and nonmagnetic. They have good corrosion resistance, which is comparable to brass but not as good as stainless steel. Press them into a drilled hole, then install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it secure.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Aluminum | ||||||
|---|---|---|---|---|---|---|
| 2-56 | 5/32" | 1/8" | 1/8" | 25 | 000000000 | 00000 |
| 4-40 | 3/16" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 4-40 | 1/4" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 6-32 | 1/4" | 3/16" | 3/16" | 25 | 000000000 | 0000 |
| 6-32 | 5/16" | 3/16" | 3/16" | 25 | 000000000 | 0000 |
| 8-32 | 1/4" | 7/32" | 7/32" | 25 | 000000000 | 0000 |
| 8-32 | 5/16" | 7/32" | 7/32" | 25 | 000000000 | 0000 |
| 10-24 | 3/8" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 10-32 | 5/16" | 1/4" | 1/4" | 25 | 000000000 | 0000 |
| 10-32 | 3/8" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 5/16" | 5/16" | 25 | 000000000 | 00000 |
| 1/4"-20 | 1/2" | 5/16" | 5/16" | 25 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 3/8" | 3/8" | 10 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 7/16" | 7/16" | 10 | 000000000 | 0000 |
| Thread Size | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Aluminum | |||||||
|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 4.8 | 4 mm | 4 mm | 25 | 000000000 | 00000 |
| M3 | 0.5 | 6.4 | 4 mm | 4 mm | 25 | 000000000 | 0000 |
| M4 | 0.7 | 6.4 | 5.6 mm | 5.6 mm | 25 | 000000000 | 0000 |
| M4 | 0.7 | 8 | 5.6 mm | 5.6 mm | 25 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 6.4 mm | 6.4 mm | 25 | 000000000 | 0000 |
| M5 | 0.8 | 9.5 | 6.4 mm | 6.4 mm | 25 | 000000000 | 00000 |
| M6 | 1 | 11.1 | 8 mm | 8 mm | 25 | 000000000 | 00000 |
| M6 | 1 | 12.7 | 8 mm | 8 mm | 25 | 000000000 | 00000 |
| M8 | 1.25 | 14.3 | 9.5 mm | 9.5 mm | 10 | 000000000 | 0000 |
| M10 | 1.5 | 15.88 | 11.1 mm | 11.1 mm | 10 | 000000000 | 0000 |
Brass Flanged Screw-to-Expand Inserts for Plastic
Made from brass, these inserts are nonmagnetic, corrosion resistant, and electrically conductive. The flange provides a load-bearing surface and acts as an electrical contact. Press them into a drilled hole, then install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it secure. Installed length includes the flange.
For technical drawings and 3-D models, click on a part number.
Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Installed Lg. | Body Lg. | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | |||||||||
| 2-56 | 0.156" | 0.136" | 0.187" | 0.02" | 1/8" | 1/8" | 50 | 000000000 | 000000 |
| 4-40 | 0.188" | 0.168" | 0.218" | 0.02" | 5/32" | 5/32" | 50 | 000000000 | 00000 |
| 4-40 | 1/4" | 0.228" | 0.218" | 0.02" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 6-32 | 1/4" | 0.22" | 0.249" | 0.03" | 3/16" | 3/16" | 50 | 000000000 | 00000 |
| 8-32 | 0.281" | 0.246" | 0.28" | 0.03" | 7/32" | 7/32" | 25 | 000000000 | 0000 |
| 8-32 | 5/16" | 0.283" | 0.28" | 0.03" | 7/32" | 7/32" | 50 | 000000000 | 00000 |
| 10-32 | 0.313" | 0.27" | 0.312" | 0.04" | 1/4" | 1/4" | 25 | 000000000 | 0000 |
| 10-32 | 3/8" | 0.335" | 0.312" | 0.04" | 1/4" | 1/4" | 25 | 000000000 | 0000 |
| 1/4"-20 | 0.438" | 0.388" | 3/8" | 0.05" | 5/16" | 5/16" | 10 | 000000000 | 0000 |
| 1/4"-20 | 1/2" | 0.45" | 3/8" | 0.05" | 5/16" | 5/16" | 25 | 000000000 | 00000 |
| 5/16"-18 | 0.563" | 0.513" | 0.437" | 0.05" | 3/8" | 3/8" | 10 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 0.565" | 1/2" | 0.06" | 7/16" | 7/16" | 10 | 000000000 | 0000 |
Flange, mm | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Installed Lg., mm | Body Lg., mm | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | ||||||||||
| M3 | 0.5 | 4.8 | 4.29 | 5.5 | 0.51 | 4 mm | 4 mm | 50 | 000000000 | 00000 |
| M3 | 0.5 | 6.3 | 5.8 | 5.5 | 0.51 | 4 mm | 4 mm | 25 | 000000000 | 0000 |
| M4 | 0.7 | 7.1 | 6.25 | 7.1 | 0.81 | 5.6 mm | 5.6 mm | 25 | 000000000 | 0000 |
| M4 | 0.7 | 8 | 7.19 | 7.1 | 0.81 | 5.6 mm | 5.6 mm | 50 | 000000000 | 0000 |
| M5 | 0.8 | 9.5 | 8.51 | 7.9 | 0.99 | 6.4 mm | 6.4 mm | 25 | 000000000 | 0000 |
| M6 | 1 | 12.7 | 11.45 | 9.5 | 1.25 | 8 mm | 8 mm | 25 | 000000000 | 0000 |
| M8 | 1.25 | 14.3 | 13.05 | 11.1 | 1.25 | 9.5 mm | 9.5 mm | 10 | 000000000 | 0000 |
18-8 Stainless Steel Flanged Screw-to-Expand Inserts for Plastic
These 18-8 stainless steel inserts have good corrosion resistance and may be mildly magnetic. The flange provides a load-bearing surface. Press them into a drilled hole, then install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it secure. Installed length includes the flange.
For technical drawings and 3-D models, click on a part number.
Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Installed Lg. | Body Lg. | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
| 2-56 | 5/32" | 0.136" | 0.187" | 0.02" | 1/8" | 1/8" | 10 | 000000000 | 00000 |
| 4-40 | 3/16" | 0.168" | 0.218" | 0.02" | 5/32" | 5/32" | 10 | 000000000 | 00000 |
| 6-32 | 1/4" | 0.23" | 0.249" | 0.02" | 3/16" | 3/16" | 10 | 000000000 | 00000 |
| 8-32 | 5/16" | 0.293" | 0.28" | 0.02" | 7/32" | 7/32" | 5 | 000000000 | 0000 |
| 10-32 | 3/8" | 0.345" | 0.312" | 0.03" | 1/4" | 1/4" | 5 | 000000000 | 0000 |
| 1/4"-20 | 1/2" | 0.47" | 3/8" | 0.03" | 5/16" | 5/16" | 5 | 000000000 | 00000 |
Flange, mm | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Installed Lg., mm | Body Lg., mm | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||
| M3 | 0.5 | 4.8 | 4.3 | 5.5 | 0.51 | 4 mm | 4 mm | 5 | 000000000 | 00000 |
| M4 | 0.7 | 8 | 7.1 | 7.1 | 0.81 | 5.6 mm | 5.6 mm | 5 | 000000000 | 0000 |
| M5 | 0.8 | 9.5 | 8.5 | 7.9 | 0.99 | 6.4 mm | 6.4 mm | 5 | 000000000 | 0000 |
| M6 | 1 | 12.7 | 11.5 | 9.5 | 1.25 | 8 mm | 8 mm | 1 | 000000000 | 0000 |
Aluminum Flanged Screw-to-Expand Inserts for Plastic
These aluminum inserts are 70% lighter than brass inserts, electrically conductive, and nonmagnetic. They have good corrosion resistance, which is comparable to brass but not as good as stainless steel. The flange provides a load-bearing surface and acts as an electrical contact. Press them into a drilled hole, then install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it secure. Installed length includes the flange.
For technical drawings and 3-D models, click on a part number.
Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Installed Lg. | Body Lg. | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Aluminum | |||||||||
| 2-56 | 5/32" | 0.136" | 3/16" | 0.02" | 1/8" | 1/8" | 25 | 000000000 | 000000 |
| 4-40 | 0.186" | 0.166" | 7/32" | 0.02" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 4-40 | 0.248" | 0.228" | 7/32" | 0.02" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 6-32 | 0.252" | 0.222" | 1/4" | 0.03" | 3/16" | 3/16" | 25 | 000000000 | 0000 |
| 6-32 | 0.283" | 0.253" | 1/4" | 0.03" | 3/16" | 3/16" | 25 | 000000000 | 0000 |
| 8-32 | 0.286" | 0.246" | 9/32" | 0.04" | 7/32" | 7/32" | 25 | 000000000 | 00000 |
| 8-32 | 0.318" | 0.278" | 9/32" | 0.04" | 7/32" | 7/32" | 25 | 000000000 | 00000 |
| 10-24 | 3/8" | 0.345" | 5/16" | 0.03" | 1/4" | 1/4" | 10 | 000000000 | 0000 |
| 10-32 | 0.31" | 0.27" | 5/16" | 0.04" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 10-32 | 0.372" | 0.332" | 5/16" | 0.04" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 1/4"-20 | 0.438" | 0.388" | 3/8" | 0.05" | 5/16" | 5/16" | 20 | 000000000 | 00000 |
| 1/4"-20 | 1/2" | 0.45" | 3/8" | 0.05" | 5/16" | 5/16" | 20 | 000000000 | 00000 |
| 5/16"-18 | 0.563" | 0.533" | 7/16" | 0.03" | 3/8" | 3/8" | 10 | 000000000 | 00000 |
| 3/8"-16 | 5/8" | 0.595" | 1/2" | 0.03" | 7/16" | 0.438" | 10 | 000000000 | 00000 |
Flange, mm | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Installed Lg., mm | Body Lg., mm | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Aluminum | ||||||||||
| M3 | 0.5 | 4.78 | 4.22 | 5.6 | 0.56 | 4 mm | 4 mm | 25 | 000000000 | 00000 |
| M3 | 0.5 | 6.36 | 5.8 | 5.6 | 0.56 | 4 mm | 4 mm | 25 | 000000000 | 0000 |
| M4 | 0.7 | 7.14 | 6.25 | 7.1 | 0.89 | 5.6 mm | 5.6 mm | 25 | 000000000 | 00000 |
| M4 | 0.7 | 7.95 | 7.06 | 7.1 | 0.89 | 5.6 mm | 5.6 mm | 25 | 000000000 | 00000 |
| M5 | 0.8 | 7.95 | 6.86 | 8 | 1.09 | 6.4 mm | 6.4 mm | 25 | 000000000 | 00000 |
| M5 | 0.8 | 9.52 | 8.43 | 8 | 1.09 | 6.4 mm | 6.4 mm | 25 | 000000000 | 00000 |
| M6 | 1 | 11.13 | 9.86 | 9.5 | 1.27 | 8 mm | 8 mm | 25 | 000000000 | 00000 |
| M6 | 1 | 12.7 | 11.43 | 9.5 | 1.27 | 8 mm | 8 mm | 25 | 000000000 | 00000 |
| M8 | 1.25 | 14.3 | 13.54 | 11.1 | 0.76 | 9.5 mm | 9.5 mm | 10 | 000000000 | 00000 |
| M10 | 1.5 | 15.88 | 15.11 | 12.7 | 0.76 | 11.1 mm | 11.1 mm | 10 | 000000000 | 00000 |
Screw-to-Expand Inserts for Through Holes in Plastic
The flange keeps these inserts from pulling through a hole. Install on the underside of the material by pressing them into a drilled hole. Install a screw to expand the insert and drive the knurls into the surrounding plastic to keep it from pulling out. Made from brass, they’re nonmagnetic, corrosion resistant, and electrically conductive. Installed length includes the flange.
For technical drawings and 3-D models, click on a part number.
Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Installed Lg. | Body Lg. | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | |||||||||
| 2-56 | 5/32" | 0.136" | 0.187" | 0.02" | 1/8" | 1/8" | 25 | 000000000 | 00000 |
| 4-40 | 3/16" | 0.168" | 0.218" | 0.02" | 5/32" | 5/32" | 25 | 000000000 | 0000 |
| 6-32 | 1/4" | 0.224" | 0.249" | 0.03" | 3/16" | 3/16" | 25 | 000000000 | 00000 |
| 8-32 | 5/16" | 0.283" | 0.28" | 0.03" | 7/32" | 7/32" | 25 | 000000000 | 0000 |
| 10-32 | 3/8" | 0.336" | 0.312" | 0.04" | 1/4" | 1/4" | 25 | 000000000 | 00000 |
| 1/4"-20 | 1/2" | 0.45" | 3/8" | 0.05" | 5/16" | 5/16" | 25 | 000000000 | 00000 |
Flange, mm | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Installed Lg., mm | Body Lg., mm | Dia. | Thick. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Brass | ||||||||||
| M2 | 0.4 | 4 | 3.5 | 4.8 | 0.5 | 3.2 mm | 3.2 mm | 25 | 000000000 | 000000 |
| M2.5 | 0.45 | 4.8 | 4.25 | 5.6 | 0.55 | 4 mm | 4 mm | 25 | 000000000 | 00000 |
| M3 | 0.5 | 4.8 | 4.25 | 5.6 | 0.55 | 4 mm | 4 mm | 25 | 000000000 | 00000 |
| M4 | 0.7 | 8 | 7.15 | 7.2 | 0.85 | 5.6 mm | 5.6 mm | 10 | 000000000 | 0000 |
| M5 | 0.8 | 9.5 | 8.5 | 8 | 1 | 6.4 mm | 6.4 mm | 10 | 000000000 | 0000 |
| M6 | 1 | 12.7 | 11.4 | 9.5 | 1.3 | 8 mm | 8 mm | 10 | 000000000 | 00000 |
| M8 | 1.25 | 12.7 | 11.4 | 11 | 1.3 | 9.6 mm | 9.6 mm | 10 | 000000000 | 00000 |
Pull-Out Resistant Screw-to-Expand Inserts for Plastic
Fins cut into the surrounding material for a more secure hold than knurled inserts. Press or hammer them into a drilled hole, then install a screw. The screw expands the insert and drives the fins into the surrounding plastic to keep it secure. Made from brass, they’re nonmagnetic, corrosion resistant, and electrically conductive.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Fins | Pkg. Qty. | Pkg. | |
Brass | |||||||
|---|---|---|---|---|---|---|---|
| 6-32 | 0.188" | No. 5 | 0.2055" | 1 | 25 | 000000000 | 00000 |
| 6-32 | 3/8" | No. 5 | 0.2055" | 2 | 25 | 000000000 | 00000 |
| 8-32 | 0.188" | 15/64" | 15/64" | 1 | 25 | 000000000 | 0000 |
| 8-32 | 3/8" | 15/64" | 15/64" | 2 | 25 | 000000000 | 00000 |
| 10-24 | 3/8" | G | 0.261" | 2 | 25 | 000000000 | 00000 |
| 10-32 | 0.188" | G | 0.261" | 1 | 25 | 000000000 | 00000 |
| 10-32 | 3/8" | G | 0.261" | 2 | 25 | 000000000 | 00000 |
| 10-32 | 0.563" | 11/32" | 11/32" | 3 | 10 | 000000000 | 0000 |
| 1/4"-20 | 3/8" | 21/64" | 21/64" | 2 | 25 | 000000000 | 00000 |
| 1/4"-20 | 0.563" | 13/32" | 13/32" | 3 | 10 | 000000000 | 0000 |
| 5/16"-18 | 0.563" | 15/32" | 15/32" | 3 | 5 | 000000000 | 0000 |