Spiralock Corporation, A Detroit Tool Indistries Company

Introduced in 1979, Spiralock Internal Thread Form Systems are today used by companies in the aerospace, appliance, automotive, defense, medical implant, oil exploration and many other industries.

In fact, nationally or internationally, wherever increased product reliability and reduced costs are important, Spiralock is gaining new applications.

Spiralock® is a unique and proprietary preload locking internal (female) thread form that's exceptionally resistant to transverse vibration -- the primary cause of thread loosening.

Proven in thousands of applications, Spiralock threaded holes and nuts accept standard male fasteners, eliminate the need for other locking devices ... and substantially reduce the potential for fatigue failure when compared to standard threads.

Explore our Web site for more information on how Spiralock Internal Thread Form Systems can benefit you.