The Junker vibration test, according to DIN 65151, is considered the most severe vibration test for bolted connections. In this video, we compare the performance of Nord-Lock washers with other locking methods. Nord-Lock wedge-locking washers prevent bolts loosening by securing bolted joints with tension instead of friction. It is a high-quality product with documented success in many industries worldwide. Nord-Lock safety lock washers have been rigorously tested and approved by independent institutes as well as certification authorities.