The Spiralock thread is claimed to be highly resistant to shock, vibration, and temperature induced loosening, and is now manufactured in a range of corrosion-resistant, stainless steel fractional and metric hex flange nuts, which are available from stock.

Spiralock threaded nuts are designed to accept standard male fasteners and to eliminate the need for other locking devices. Assembly is simplified, since the nut is free spinning until the clamp load is applied, and the potential for fatigue failure is said to be considerably lower than for standard threads.

The company says that for ship repair, maintenance and conversion, the nuts are manufactured in 316 grade austenitic stainless steel composition, rather than lower grades of stainless steel. They can typically be used to maintain joint integrity on large diesel engines and other marine applications subjected to repeated exposure to wash downs, harsh chemicals, and salt spray.

The Spiralock thread form is claimed to solve thread loosening and joint integrity issues by changing the physics of how the threads interact. In traditional 60° threads, the gap between the upper edges of the male and female threads can lead to shock, vibration, or temperature-caused thread loosening. Stress concentration and fatigue at the first few engaged threads is also a problem, particularly with softer metals. The Spiralock thread profile closes the gap that causes loosening, improving the integrity and reliability of threaded joints.