Formerly Emhart Teknologies & Infastech

The Edge is in the Wedge!

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:

  • Superior resistance to vibration loosening
  • Improved joint integrity
  • More evenly distributed load
  • Consistent, repeated reusability
  • Elimination of secondary locking devices

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.

About Us
About Us

Spiralock has been offering reliable solutions to thread loosening issues since the early 1980s, when it was adopted by NASA.

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Technology
Technology

Spiralock has re-engineered the standard internal (female) thread form, adding a unique 30° wedge ramp at the root of the thread.

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Products
Products

Spiralock offers a variety of fastener products, thread cutting and cold forming taps, threading inserts, thread milling cutters, and gages.

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Information Center
Information Center

Our information center includes FAQs, a troubleshooting guide, and drill and torque calculators.

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Contact Us
Contact Us

Headquartered in Madison Heights, MI, Spiralock offers global support through our offices in Europe, South America, and Asia.

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News
Spiralock News

In our news section you can access current news and information about Spiralock and our branded products.

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