Press-in threaded insert for plastics (UFL_HFL)

Creating a durable threaded connection in plastic parts often requires more than a thread formed directly in the material. Brass press-in threaded inserts provide a practical way to add a reusable metal thread to thermoplastic components, improving the strength and service life of the assembly.

The UFL and HFL series are designed for press-in installation, allowing inserts to be fitted into a prepared hole without heat staking or ultrasonic equipment. This installation method simplifies production, reduces assembly time and helps maintain consistent results across high-volume manufacturing processes.

ATS supplies threaded inserts for plastics and provides technical guidance to help customers identify the most suitable solution according to the plastic material, application requirements and assembly process.

Once installed, the insert becomes mechanically retained inside the plastic thanks to its external knurling and specially designed anchoring features. This creates a secure connection capable of withstanding repeated screw installation, tensile loads and torque without damaging the surrounding material.

Compared with threads cut or moulded directly into plastic, a brass threaded insert distributes mechanical loads more effectively, reduces wear and helps preserve the integrity of the component throughout its service life.

Press-in inserts are suitable for a wide range of soft and medium-density thermoplastics, including ABS, PP, PE, PVC and PA. They are widely used wherever lightweight plastic components require a durable threaded connection that can be assembled and disassembled multiple times.

Typical applications include:

• automotive components;
• electrical and electronic equipment;
• lighting systems;
• industrial automation;
• machinery and technical plastic assemblies.

The UFL series is intended for standard applications where a reliable press-fit threaded insert is required. The HFL series incorporates a flange that provides a larger bearing surface, helping to distribute loads more evenly and improve fastening stability in demanding applications.

Selecting the right insert depends on several factors, including the thermoplastic material, wall thickness, installation method, screw size and the mechanical loads the assembly will experience during operation.

ATS supplies brass threaded inserts for plastic and supports manufacturers in selecting the most appropriate fastening solution for their applications. The technical evaluation considers the characteristics of the plastic component, assembly conditions and long-term performance requirements.

For dimensions, available thread sizes, tolerances and technical specifications, consult the dedicated product data sheet or contact ATS Lamberti for assistance in selecting the most suitable press-in threaded insert for plastic.