Spiralock^®

Technologically-superior fastening system ideally suited for threaded joint applications subjected to heavy vibration and challenging environments.

Spiralock^® Innovation

Whether it's a simple change of a fastener or a custom-designed solution, Spiralock technology delivers reliability of product performance that customers can count on.

The Edge is in the Wedge^TM

By adding a 30° wedge ramp at the root of the internal thread, Spiralock has engineered a simple yet effective way to transform a traditional threaded joint into a safer and more reliable element. This remarkable design provides exceptional resistance to vibration loosening, improved joint integrity and consistent, repeated reusability while eliminating the need for secondary locking devices.

To survive the vibration and high temperatures of launch, we require the most reliable locking engagement thread. Screws must remain tight without opportunity for retightening. With conventional threading, screws loosened up and backed out under testing. The Spiralock thread form retained a tight seal at 300° C. Once torqued down properly, the screws stayed put in the threads, which helped us meet our flight schedule.
Dan Harpold NASA Scientist

Load Distribution

The load carried by Spiralock threads is more uniform than 60° threads. Load percentage on the first engaged Spiralock thread is significantly lower.

Spiralock^® Technology

The standard internal thread profile has been transformed into a self-locking female thread form with the addition of a unique 30° wedge ramp at the root of the thread.

Vibration Loosening Resistance

Testing on Junker vibration equipment has proven that the Spiralock thread form outperforms other thread locking devices.

See It Work

Watch Spiralock in animated clips showing the Morphing Animation, Load Vector Comparison, and Photoelastic Analysis.

Spiralock^® Calculators

Use our interactive Torque and Drill Size calculators to determine your required values and recommendations.

Spiralock^® Drill Size Calculator
Spiralock Torque Calculator

Spiralock^® Taps & Gages

Spiralock^® taps come in different styles to accommodate your needs and requirements. Gaging Spiralock^® threads requires the use of special gages to ensure proper function of the thread. Non-Spiralock gages cannot determine the functionality of Spiralock^® threads.

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Taps Sizes Chart - English
Taps Sizes Chart - Metric
Taps Sizes Chart - Fractional