Description: 316 stainless steel provides corrosion resistance. The Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to allow the driver to slip out of the head to help prevent over-tightening and damage to the thread or fastener. Flat head is cone shaped for use in countersunk holes and has a flat top that fits flush with the mated surface. Machine screws are threaded fasteners that are typically used with nuts or drilled and tapped (threaded) holes.
eBay