Description: Flat head cap screws, zinc plated surface,carbon steel rivet nut. This Nutsert has a large flange to provide increased strength in punched and drilled holes. Knurled body provides a higher resistance to spin out when installed in soft materials. WHAT IS A Rivet Nut? A Rivet Nut fastener is a tubular rivet with internal threads. It can be installed in seconds form one side of the work. Once installed, no finishing work is required on the Rivet Nut fastener. The added benefit of not only being a dependable fastener, they are ready to use with clean threads available for screw attachments.Blind thinsheet materials that are too thin for a tapped thread. Blind Rivet Nuts also areused when an application has little or no access to the backside as they can be installed from the front side of the work piece. HOW DOES A Rivet Nut WORK? A hand or power tool pull-up stud engages the threads of the RIVET NUT fastener and exerts a pull, causing the shank to expand tightly against the material being fastened. This step upsetting the RIVET NUT fastener. The specific steps as following: Step 1: Put on the rivet nut Step 2: Spin on the rivet nut Step 3: Insert into the hole Step 4: Press and upset the rivet nut, withdraw the gun Step 5: Install the svrew bolt