New Test Data Offers Resolution for Toughest Engineering Challenges

For engineers combating vibrational loosening, axial-torsional loading, joint fatigue, and ther mal extremes, conventional fastening methods involving standard 60 degree threads have posed design limitations for too long and proven solutions, backed by test data, have been relatively nonexistent. Fortunately today, engineers are successfully attacking these problems with an innovative self-locking fastener called Spiralock, whose effectiveness has been validated in published test studies at leading institutions including MIT, the Goddard Space Flight Center, Lawrence Livermore National Laboratory, and British Aerospace, as well as at noted corporations such as Mack Truck and Dana Corporation. With the standard 60 degree thread form, the gap between the crest of the male and female threads can lead to vibration-induced thread loosening. Stress concentration and fatigue risk at the first few engaged threads is also a problem due to substantial surface contact. Because the standard thread form is axially loaded, there's an increased probability of shear, especially in soft metals. And temperature extremes can expand or contract surfaces and materials, potentially compromising joint integrity.