The S19, S20 (Short version) are inserts for plastic with heat/ultrasonic installation into cylindrical holes

In the short version these inserts offer the advantage of having reduced dimensions, shorter installation times and lower costs. On the other hand, the resistance to torque and pull out loads is reduced comparing to long version

Suitable for all types of thermoplastics, even dry and fragile ones such as polycarbonates

The S19, S20 inserts are designed with a wide center knurl coupled with two smaller knurls and deep undercuts on both ends to maximize torque and pull out performance

They induce very low radial stresses and are therefore particularly recommended in holes with thin walls. In this case the hole must be a bit wider. Optimal size should be determined after appropriate practical tests

Installation must be carried out using heat conduction or ultrasonic machines. The holes should be sized as indicated in the product datasheet

They are available in unheaded S19, and headed (flanged) S20 versions. The S20 has the same body style as the S19 with the addition of a head to provide more bearing surface for the mating component to prevent jack-out. In the S20 a screw can be inserted on the opposite side of the flange, allowing to achieve very high pull-out resistance. The head also provides a large contact area, which is useful for electrical contacts and specific applications

Inch version from 4-40 to 1/4-20 is available upon request