Spiralock is a technologically superior fastening system ideally suited for threaded joint applications subjected to heavy shock and vibration, extreme temperatures, long hours of strenuous operation, and millions of loading cycles without the opportunity for retightening. Our proprietary internal thread form features a unique 30° wedge ramp at the root of the thread that locks the bolt securely in the threaded joint, offering the following benefits:
Spiralock products include flange nuts, self-clinching nuts, tanged and Drive Notch™ (tang-free) wire thread inserts, threaded inserts, threading inserts, taps and gages, and thread milling cutters as well as a variety of custom-made products that meet our customers’ needs.
Spiralock has been offering reliable solutions to thread loosening issues since the early 1980s, when it was adopted by NASA.
Spiralock has re-engineered the standard internal (female) thread form, adding a unique 30° wedge ramp at the root of the thread.
Spiralock offers a variety of fastener products, thread cutting and cold forming taps, threading inserts, thread milling cutters, and gages.
Our information center includes FAQs, a troubleshooting guide, and drill and torque calculators.
Headquartered in Madison Heights, MI, Spiralock offers global support through our offices in Europe, South America, and Asia.