A shoulder screw has a partially smooth shaft that will allow the bolted material some rotation and movement around the screw axis, while the threaded end will typically have a nut to maintain the screw's position. They are used in instances where pre-tapped holes require alignment with some tolerance. This allows the work pieces either a joint, pivot, or sliding motion.
Look after the pennies and the pounds will look after themselves – as true today as its always been! And there’s some very simple steps that can be taken to reduce daily running costs of any business, across all departments.