Press-in threaded insert (USP_HSP)

Press-in threaded inserts are used to create reliable metal threads inside components made from hard and brittle thermosetting materials. They provide a practical solution when a strong and durable threaded connection is required, without the need for heat installation or ultrasonic insertion methods, helping to maintain the original properties of the material.

Manufactured in brass, these inserts provide a robust internal thread capable of withstanding repeated screw tightening and removal cycles. Compared with a thread formed directly into plastic, a brass threaded insert offers improved mechanical strength, better wear resistance and more consistent fastening performance over the lifetime of the component.

The external design, featuring sharp-edged knurling, improves the mechanical grip between the insert and the plastic material. This structure increases resistance to rotation and torque during assembly, providing a secure connection even in applications where components require frequent maintenance, replacement or repeated assembly operations.

The range includes two different versions designed to meet specific application requirements. The USP version is a headless threaded insert, suitable when a flush installation and reduced overall dimensions are required. The HSP version features an integrated head, providing a larger bearing surface and making it particularly suitable for applications involving thin wall components or where improved load distribution is required.

Press-in inserts for plastics are widely used across industrial sectors including electronics, electrical equipment, automation, industrial machinery and the production of technical components made from thermosetting materials. They are an effective solution wherever a reliable threaded connection, high resistance to rotation and long-term assembly performance are required.

Selecting the correct threaded insert depends on several application factors, including the component geometry, material characteristics, wall thickness, thread size and expected mechanical loads. Choosing the right solution from the beginning helps improve fastening reliability, reduce component damage risks and optimise the overall assembly process.

A.T.S. Lamberti supplies threaded inserts for plastic applications and supports companies, designers and technical departments in identifying the most suitable fastening solution for their requirements. Thanks to its experience in industrial fastening systems, ATS provides technical assistance during insert selection, considering material properties, assembly conditions and required performance.

Choosing the right insert at the design stage can improve the reliability of the final component, simplify assembly operations and extend the service life of the finished product. In addition to supplying the product, ATS provides technical consultancy and application support to help customers identify the most appropriate insert solution for their industrial needs.

Dimensions, available sizes and technical specifications for USP threaded inserts (headless) and HSP threaded inserts (with head) are available in the dedicated product documentation for plastic inserts.