The Phillips pan head machine screws also referred to as Cross recessed pan head machine screws. These fasteners are often used with nuts but also often driven into tapped holes (without nuts).they tend to be mostly available in smaller sizes and the smaller sizes are referred to as screws or less ambiguously as machine screws, although some kinds of machine screw can be referred to as stove bolts.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.