Material: Rivet body is aluminum alloy, mandrel is carbon steel, providing resistance to rust and corrosion. Feature: Mandrel creates a recess at the blind end, expanding the rivet shank during installation. Performance: flange increases load-bearing area for riveting force and stability. Design: Open type with mandrel, compatible with standard rivet s. Installation: Insert rivet into pre-drilled hole and use a rivet to pull the mandrel for secure fixing., Manufacturer: TNPLKIUYT