A Rivet Nut fastener is a tubular rivet with internal thread which can be installed in seconds form one side of the work. Once installed, no finishing work is required on the fastener. The added advantage of not only being a dependable fastener, they are ready to use with clean threads available for screw attachments. Rivet Nuts 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. Product description Stainless steel m8 rivet nut threaded insert nutsert. Thread pitch: M8-1.25mm, the pitch is 1.25mm. Body Diameter:10.9mm, Application Drill Hole Size:11mm. Head Diameter.: 14.5mm ./ Head Height: 1.5mm. Total Length: 18.5mm ,/ Grip Range: 1.0-3.5 mm. Colour:Silver Material:304 stainless steel Package Contents: 30 * M8 Stainless Steel Rivet Nuts Threaded Inserts Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.