Press-in threaded insert (UBL_HBL_BLR)

Creating a reliable threaded connection inside thermosetting plastic components can be a critical challenge when the application requires repeated assembly, mechanical resistance and long-term reliability. Unlike a thread made directly into the plastic material, a brass threaded insert provides a durable metal thread that helps maintain fastening performance over time.

The UBL, HBL and BLR press-fit threaded inserts are designed for installation into thermosetting materials through a mechanical expansion system. Once positioned inside the prepared hole, the insert expands and locks into the surrounding material, creating a stable and secure connection without requiring heat or ultrasonic installation processes.

This solution is particularly suitable for technical components where a reliable fastening point is required and where the original plastic material alone may not provide sufficient resistance against wear, loosening or repeated screw operations.

ATS supplies threaded inserts for plastic materials and thermosetting applications, supporting customers with technical advice to identify the most suitable component according to the material, assembly requirements and operating conditions of the application.

The main feature of these expansion threaded inserts is their ability to create a mechanical retention inside the component. During installation, the external geometry of the insert interacts with the thermosetting material, improving resistance against pull-out forces and rotation.

The result is a stable threaded connection designed for applications where reliability is essential, including components exposed to vibrations, mechanical stresses or frequent maintenance operations.

The insert geometry also provides a slight self-locking effect on the screw, helping to improve fastening stability in demanding operating environments.

The UBL_HBL_BLR range of brass threaded inserts includes different configurations developed to meet specific application requirements.

The UBL insert is the standard press-fit version, suitable for applications where a compact and reliable threaded connection is required inside thermosetting materials.

The HBL insert with head features an enlarged support surface, allowing improved load distribution and greater stability when the fastening point is subjected to higher mechanical stresses.

The BLR version with reverse slot has been developed for applications requiring specific retention characteristics, offering an alternative anchoring solution depending on component design and installation conditions.

The choice between UBL, HBL and BLR depends on several factors, including the type of thermosetting plastic, component thickness, thread size, applied loads and final operating environment.

A metal threaded insert for plastic components improves the durability of the fastening system compared with a thread directly produced in the base material.

The main benefits include:

- increased thread wear resistance;
- improved performance during repeated assembly and disassembly cycles;
- better resistance to screw loosening;
- more efficient distribution of mechanical loads;
- greater reliability throughout the component life cycle.

For these reasons, press-fit expansion inserts are widely used when manufacturers need a strong, precise and reusable fastening solution in technical plastic parts.

Brass threaded inserts for thermosetting materials are used in a wide range of industrial sectors where secure and repeatable fastening is required.

Typical applications include electrical and electronic equipment, industrial automation systems, control devices, technical plastic components and engineered assemblies where maintaining a reliable threaded connection is essential.

Integrating a brass insert into the component allows designers to combine the advantages of plastic moulded parts with the durability of a metal thread, improving assembly quality without compromising the integrity of the component.

Selecting the correct brass threaded insert for thermosetting plastics requires an evaluation of different technical aspects, not only the required thread size. Material properties, component geometry, installation method and application conditions all influence the final performance of the fastening system.

ATS Lamberti provides technical assistance and product selection support, helping customers identify the most suitable insert solution for their specific industrial requirements.

For available dimensions, thread options, technical characteristics and installation information, consult the dedicated documentation or contact ATS to identify the most suitable UBL, HBL or BLR expansion press-fit threaded insert for your application.