M3 x 8 x 4 mm knurled brass insert for plastic

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This M3 brass insert is designed to create a strong and durable internal thread in plastic parts. The insert has an internal M3 thread and a knurled external surface that provides a secure mechanical grip in the surrounding plastic.

The insert is made of brass and has a characteristic gold colored surface. The diagonally knurled external surface helps prevent the insert from rotating or being pulled out when a screw is installed or removed.

The insert can be used in 3D printed parts, electronic enclosures, plastic housings, robotics projects and other mechanical constructions where a durable metal thread is required. It is especially suitable for thermoplastics where the insert can be installed using heat. When the brass insert is heated, the surrounding plastic softens and flows around the insert. After cooling, the plastic locks the insert securely in place.

The insert can also be installed by press fitting into a suitably sized hole, depending on the plastic material and construction. It provides a considerably more durable thread than creating a thread directly in plastic.

The M3 thread makes the insert suitable for standard M3 screws. The dimensions M3 x 8 x 4 mm indicate the internal thread size, insert length and nominal external diameter. This type of insert is useful when a plastic part needs to be assembled and disassembled repeatedly without wearing out the internal thread.

Facts.
Type : Brass insert for plastic
Material : Brass
Internal thread : M3
Length : 8 mm
Outer diameter : aprox. 4 mm
Thread type : Metric
External surface : Knurled and toothed
Color : Brass colored
Installation : Heat installation or press fitting
Application : Plastic parts and 3D printed constructions
Suitable for : M3 screws

Included.
25 pcs

About the product.
Weight: approx 10 gram.
Contact us if you have questions at info@pchbutik.se
Article no: 4312
Remaining stock quantity can be found under the Product details tab.
In our range since: 2026-08-24

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