SPIROL Expands Insert Portfolio with New Heat/Ultrasonic Aluminum Threaded Inserts for Plastics

SPIROL is pleased to announce the launch of its newest machined Aluminum Threaded Inserts, designed for heat or ultrasonic installation into straight plastic holes. The newly released Series INS19, INS20, INS29, and INS30 expand SPIROL’s industry?leading Threaded Insert offering and complement the existing brass product line, providing customers with greater flexibility in material selection and performance optimization.

The four new Aluminum Threaded Inserts Series complete SPIROL’s comprehensive Aluminum Insert portfolio, offering solutions across the most commonly used installation methods, including Molded-In, post-mold (cold) Press-In, and Heat/Ultrasonic installation. Heat and ultrasonic installation methods locally remelt the surrounding plastic, enabling improved material flow into the Insert’s undercuts and knurls, increasing torque resistance and pull-out performance in the plastic assembly compared to Press-In Inserts.

While brass remains the industry standard for machined Threaded Inserts for Plastics, 2024 aluminum delivers compelling advantages for modern product designs. Aluminum provides significant weight reduction - approximately 1/3 the weight of brass - making it an ideal choice for lightweight applications and weight-sensitive assemblies.

In addition, 2024 aluminum is a lead-free alloy, supporting evolving environmental, health, and safety requirements across global markets. Its galvanic properties also provide increased application flexibility when mating with dissimilar materials compared to traditional brass Inserts.

From a performance standpoint, the high strength of 2024 aluminum enables improved joint integrity with less thread engagement, while delivering enhanced load-bearing capability. These attributes can contribute to more efficient designs, reduced assembly complexity, and improved overall performance.

With this new product launch, SPIROL continues to deliver innovative fastening solutions that help customers reduce assembly costs, improve performance, and meet evolving design and regulatory requirements.

For more information or to request samples, please contact your local SPIROL office or visit www.SPIROLShims.com.

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About SPIROL

SPIROL is a leading expert in fastening, joining and assembly. We are a technical resource that provides high quality components that improve the quality of your assembly, extend the life of your products and reduce your total manufacturing costs.

We are a global manufacturer of engineered fasteners, installation machines, and parts feeding equipment producing over two billion components annually. In addition to high quality products, SPIROL has Application Engineers throughout the world to assist you in your designs, supported by state-of-the-art manufacturing centers and global stocking facilities to simplify the logistics of delivering your product.

Contact SPIROL early in the design stage of your next project for complimentary Application Engineering Assistance!