Dog point socket set screws manufactured to DIN 916 in a self colour finish.
Self coloured finishes have no protection against corrosion, and are more suited for use in internal joinery applications. Self colour finishes have no definitive colour and can vary with the effects of natural oxidisation and weathering, from a bright zinc finish to a dark black colour. Before being used in exterior environments, they should be coated or painted with a protective covering.
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.