Company Overview: Headquarters:  Madison Heights, Michigan Global locations: South America, Europe, Asia Industries served: aerospace, defense, automotive, truck, diesel engines, medical, oil, gas & power generation, farm & construction, HVAC, HAM and others What is Spiralock®? It’s a unique, proprietary, preload locking internal (female) thread form featuring a 30-degree wedge ramp at the root of the thread which locks the bolt securely into place.  Spiralock thread form is unidirectional and mates with standard 60-degree male thread fasteners. Spiralock effectively solves fastening problems for its customers worldwide, increasing product reliability, simplifying assembly and reducing costs and warranty claims. Spiralock products feature a variety of fasteners, cutting tools and gages, along with engineering, logistics and support services. Attributes of Spiralock thread form: Exceptional resistance to the effects of vibration loosening Substantial reduction of fatigue failure in comparison to the standard, symmetrical thread form Elimination of secondary locking devices (lock washers, adhesives, crimping, inserts, etc.) Reusability Free spinning More even, radial load distribution Self-centering