PEM® RT® Free-Running Locking Technology
Reliable Fastening Performance in High-Vibration Environments
In demanding applications where vibration can cause conventional fasteners to loosen over time, PEM® RT® Free-Running Locking Technology provides a durable and efficient solution. Designed with a modified thread profile, RT technology allows screws to turn freely during installation while creating locking resistance once clamp load is applied.
This unique design helps maintain joint integrity, reduce assembly time, and eliminate the need for additional locking components such as adhesives or lock washers.
Available in self-clinching locknuts and standoffs, PEM RT solutions install permanently into sheet metal while delivering superior vibration resistance and long-term reliability.

Discover the Features + Benefits | RT® Free-Running Locking Technology
- Free-Running Thread Design: Specially engineered thread geometry allows mating screws to turn freely during installation until clamp load is applied.
- Modified Thread Flank Angle: The RT thread profile generates friction only under load, creating a secure locking effect once tightened.
- Integrated Locking Mechanism: Locking capability is built directly into the fastener thread design, eliminating the need for additional locking elements.
- Prevents Loosening from Vibration: Maintains joint integrity in applications exposed to vibration, shock, or dynamic loads.
- Improves Assembly Efficiency: Free-running threads reduce installation torque and speed up assembly processes.
- Reduces Component Count: Eliminates the need for lock washers, thread adhesives, or nylon inserts.
PEM RT locking fasteners are used in assemblies where vibration resistance and reliable fastening performance are critical
Common applications include:
- Server and network equipment enclosures
- Printed circuit board mounting
- Industrial machinery panels
- Robotics assemblies
More PEM Solutions
PEM® RT® Self-Clinching Locknuts
- Screw turns freely until clamp load is applied
- Flush or sub-flush installation on the back side of the panel
- Product type: S-RT™ Free-Running Locknuts
PEM® RT® Self-Clinching Locking Standoffs
- Locking threads for vibration resistance
- Permanent installation in sheet metal
- Product types: SO-RT™ – and BSO-RT™