DIN7981 ISO7049 Cross recessed pan head tapping screws.
Metric DIN 7981C is a pan head self-tapping sheet metal screws These screws are designed to cut threads into pre-drilled untapped holes of the substrate into which they are screwed. These screws are available in zinc plated steel as well as stainless steel A2 and A4.
Metric DIN 7981C pan head self-tapping sheet metal screws are fully threaded with a coarse thread and a gimlet point (Form C). Recommended to be used in thin gauge sheet metal. resinous plywood and composite materials. The pan head is cylindrical with a slightly rounded top surface and a flat bearing surface underneath.
This head style is ideal for most applications where a protruding head is acceptable.