Embedded Copper Nut

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Our Hexagonal Brass Insert Nut (also known as Dual Pass Insert Nut or Eco-friendly Brass Insert) is a precision engineered fastener designed to provide a strong internal thread to plastic parts. Commonly known as a pre-cast copper nut, this insert can be embedded into plastic or alloy parts during injection molding, heat staking or ultrasonic embedding. It forms a strong and durable threaded connection that increases the strength and life of plastic components.

Product Picture

 

Key Features:

Eco-friendly Materials:
Made from RoHS-compliant lead-free brass, this nut offers excellent corrosion resistance, making it ideal for wet or harsh environments. Unlike steel nuts, brass will not rust and is safe for use in consumer products.

Smart Design:
With a hexagonal profile and dual threaded through-hole, this nut supports symmetrical or bidirectional assembly. The knurled or barbed outer design locks securely into the plastic to prevent rotation or pull-out. Its hexagonal shape ensures easy installation with standard tools and excellent compatibility with molds.

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

high thermal conductivity of brass makes it ideal for hot or ultrasonic embedding. It is resistant to high temperatures, making it suitable for automotive, electrical and appliance applications. Its excellent thermal conductivity also makes it ideal for electronic devices that require circuits.

Flexible Installation:
Compatible with a variety of installation methods - hot melt, ultrasonic pressing, cold pressing or pre-forming - to meet various manufacturing needs and processes.

Clipers Micrometer

Torque

Depth Micrometer

Plug

Thread Guage

Ring Guage

Hardness Tester

Projector

Salt Spray Testing

Applications:

You will find these cast copper nuts widely used in consumer electronics (mobile phones, laptops), home appliances (switches, faucets) and the automotive industry (sensor housings, interior panels). Industrial machinery uses them for plastic part assembly (injection molds, conveyor belts), and the medical field uses them for corrosion-resistant, sterilizable housings. Precision instruments rely on them to avoid signal interference in sensitive environments.

Also suitable for common plastic products such as toys, lamps and packaging containers - anywhere a secure and removable threaded

With environmentally friendly materials, a sturdy design and flexible installation, cast copper nuts are your reliable plastic fastening solution. Please select the appropriate specification (M3-M8) according to your thread size, installation method and application needs.

If you need a shortened version or a version customized for a specific platform (Amazon, website, etc.), please let us know.