◆ Holds bolt preload against vibration and dynamic loading ● Wedge-locking cam angle exceeds bolt thread pitch so any loosening tightens the joint ▲ Pairs with matched bolt and washer for fast installation Built for critical bolted joints where bolt failure is not an option, Spring Washer Plain secures preload against vibration and dynamic load through cam-action wedge locking. Used in rail, mining, heavy plant, renewables and structural engineering. AIMS Industrial stocks the Hobson locking washer range for engineering, maintenance and procurement teams.