The rugged design of the Series 63 Through Hole and Series 65 Blind-end inserts consist of multiple bands of helical knurls to maximize torque resistance — balanced with radial undercuts to achieve a high pull-out (tensile) force.
These Molded-In Inserts are designed to be placed in a mold cavity prior to plastic injection, offering exceptional performance due to the unrestricted plastic flow into the retention features on the outside diameter of the inserts.
The lightweight, lead-free threaded inserts for plastics are manufactured from 2024-grade aluminum, providing and ideal combination of strength, corrosion-resistance, machinability, and cost. The Series 63 and Series 65 Molded-In inserts are lead-free, 40% stronger than brass, with 1/3 the weight of the same insert manufactured from brass.
Standard metric thread sizes include M4, M5, M6, and M8, and standard inch threaded sizes include 8-32, 10-24, 1/4-20, and 5/16-18.
SPIROL also offers a comprehensive line of Inserts for Plastics including Press-In, Self-Tapping, Heat / Ultrasonic and Molded-In styles to accommodate specific performance and installation requirements.
SPIROL can help in the design stage of your next project. Their application engineers can recommend the most cost effective threaded insert for plastic assemblies and can assist with critical design recommendations.