SPIROL’s new inserts are well-suited for heat and ultrasonic installation into straight plastic holes, among other common installation methods.
DANIELSON, Conn.—SPIROL’s new machined Aluminum Threaded Inserts are reported to provide compelling advantages—such as high strength and significant weight reduction—for modern product designs.
Designed for heat or ultrasonic installation into straight plastic holes, the newly released Series INS19, INS20, INS29, and INS30 Aluminum Threaded Inserts complement SPIROL’s existing brass product line. In addition to providing customers with greater flexibility in material selection and performance optimization, the inserts offer solutions across the most commonly used installation methods, including molded-in, post-mold (cold) press-in, and heat and ultrasonic installation, the company said in the release.
The galvanic properties of SPIROL’s new aluminum threaded inserts are reported to provide increased application flexibility versus traditional brass inserts when mating with dissimilar materials. (Image courtesy SPIROL).
Heat and ultrasonic installation methods locally remelt the surrounding plastic, enabling improved material flow into the insert’s undercuts and knurls. This is said to increase 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,” the release stated. “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, the company said.
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 stated that it continues to deliver “innovative fastening solutions that help customers reduce assembly costs, improve performance, and meet evolving design and regulatory requirements.”