Brass Heat Set Inserts for Plastic Materials

The 40/THC Brass Flat Head Insert is designed to create strong, durable metal threads in plastic components. Manufactured from high-quality brass, these inserts are specifically engineered for use with thermoplastic materials and provide a reliable threaded fixing point for repeated assembly and disassembly.

Featuring a flat head design, these inserts provide positive positioning during installation while helping to distribute load across the surface of the plastic component. Once installed, the insert allows two products to be securely joined using a standard male threaded screw or bolt, creating a strong and reusable threaded connection.

Unlike glued or press-fit alternatives, heat-set and ultrasonic installation methods create a secure mechanical bond within the plastic, resulting in excellent pull-out resistance, torque performance, and long-term durability.

Ideal for Thermoplastic and Injection Moulded Components

The 40/THC insert is designed for installation using thermal (heat-set) or ultrasonic insertion processes. Simply pre-drill the plastic component to the recommended hole size and install the insert using the appropriate equipment. During installation, the plastic softens and flows around the insert body, creating a secure fixing without causing stress fractures or weakening the surrounding material.

This process creates a durable threaded insert within the plastic, making it significantly stronger and more reliable than conventional glued or press-fit fastening methods. As a result, these inserts are widely used in applications requiring repeated assembly and disassembly without compromising the integrity of the plastic component.

Available Sizes

• M2
• M2.5
• M3
• M3.5
• M4
• M5
• M6
• M8
• M10

Key Features

• Flat head design for positive positioning and load distribution
• Designed for thermal (heat-set) and ultrasonic installation
• Creates strong, reusable metric threads in plastic materials
• Manufactured from high-quality brass
• Excellent pull-out and torque resistance
• Open design for standard threaded fasteners
• Reduces the risk of stress fractures in plastic components
• More durable than glue or press-fit alternatives
• Suitable for thermoplastics and injection moulded components
• Self-colour brass finish
• Available in a wide range of metric thread sizes

Product Specifications

Code: 40/THC
Shape: Round
Head Style: Flat Head
Style: Open
Material: Brass
Body Type: Metric
Finish: Self Colour

Typical Applications

• Injection moulded plastic components
• Electronic enclosures
• Consumer products
• Automotive plastic assemblies
• Electrical housings
• Medical devices
• Telecommunications equipment
• Industrial plastic components
• 3D printed parts

Why Choose THC Brass Flat Head Inserts?

THC Brass Flat Head Inserts provide a permanent, high-strength threaded fixing point in plastic materials. Installed using thermal or ultrasonic methods, they create a secure mechanical bond within the parent material, delivering excellent pull-out resistance and long-term durability. The flat head design assists with positioning during installation while providing a neat and professional finish for demanding plastic assembly applications.

Product Summary

The 40/THC Brass Flat Head Insert provides strong, reusable metric threads in plastic materials. Designed for thermal and ultrasonic installation, these brass inserts offer excellent pull-out resistance, torque performance, and long-term durability for injection moulded, engineered plastic, and 3D printed components. Available in M2 to M10 sizes.