A Rivet Nut fastener is a tubular rivet with internal threads. It can be installed in seconds form one side of the work. The added benefit of not only being a dependable fastener, they are ready to use with clean threads available for screw attachments. Once installed, they are permanently attached to the mating material, allowing the associated nut to be removed in service without the risk of the fastener becoming dislodged. Also are used when an application has little or no access to the backside as they can be installed from the front side of the work piece. This Nutsert has a large flange to provide increased strength in punched and drilled holes. Flat head cap screws, knurled body for anti rotation and more durable. Can be installed in many different kinds of material including steel, plastic and fiberglass. Top Quality Alumium Rivet Nut Rivnut Insert Nutsert - Open end Surface finished #10-24 UNC Large Flange, Knurled Body Material: Aluminum Body Diameter: 0.275" Total Length: 0.5" Application hole size: 0.285" Package: 100 pcs in a bag