Hollow rivet with Countersunk head According to GOST 12640-80

Rivet GOST 12640-80 - fasteners, which are used when it is necessary to create a durable and reliable connection, which will not be conspicuous. This is achieved by the special design of the head. It is flat. In this case, the base is made under the cone. During installation, the hole for installation must be optimally countersunk. This allows you to completely recess the fastener into the part. A through hole of a longitudinal type allows you to pass wiring through these parts, as well as secondary elements. These rivets are available in three possible variations. Everything depends on the cone angle and the diameter of the product. Steel of different grades, as well as all kinds of non-ferrous metal alloys, are used for fastening. If necessary, rivets are painted or a special protective coating is applied to them.