5/32" x 3/4" blind rivet is an aluminum fastener with a 5/32-inch diameter and a 3/4-inch length, designed for permanent joining of materials from only one side of a joint, often called a "blind side". The 5/32" refers to the rivet body's diameter, while 3/4" is the total length of the rivet, which includes a head and a mandrel. When installed with a rivet tool, the mandrel is pulled, expanding the rivet body on the blind side and then breaking off, creating a secure, permanent hold.