4.0mm x 20mm Blind Pop Rivets - Aluminium \/ Zinc Plated Steel Pop Rivets, also known as Blind Rivets, are used to create strong joints in 2 or more panels, predominantly sheet metal. Pop Rivets can be installed from only one side, meaning they are useful in situations where there is no back access to the material and therefore are unable to use a nut and bolt. The two main components of a Pop Rivet are the body and mandrel. During installation, the mandrel is pulled tight causing the body of the Pop Rivet to compress and expands against the base material locking it in place on both sides. Pop Rivets are also more secure than a standard nut and bolt fastening as they are impervious to vibrating loose. The dome head pop rivet is the most versatile type of head as it provides enough bearing surface to retain all kinds of materials, except those smooth and brittle. The body of these pop rivets are made from Aluminium Mg 3,5 (EN AW 5154) and the mandrel is manufactured from Steel with a zinc coating. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. 4.0mm x 20mm Blind Pop Rivets - Aluminium / Zinc Plated Steel