Name: Csk head aluminum blind pop rivets Material: Alu rivet body / carbon steel mandrel Finsh:Polish /zinc plated Standard:DIN,ISO.ANSI Countersunk rivet is a kind of building material in our life. It is used in situations where the strength requirement is not high, the thread diameter is less than 10MM, and the screw is screwed in and tightened. Countersunk rivets are widely used in automobiles, vehicles, mechanical and electrical products, building decoration and household appliances. All or part of the screw head sinks into the connected piece. This structure is mostly used for occasions with flat and smooth appearance, such as instrument surface.