Thread Size: M8 x 1.25mm; Drill hole size: 11mm / 0.43 inch; Fastener Type: Hollow Mechanical internal thread, materials, uniform wall thickness, treatment, corrosion resistance, and high strength. Drill a hole according to the size of the rivet nut installation hole, insert the rivet nut, and tighten the locking nut with the rivet tool. Widely used in sheet metal, household thin iron cabinet, roof, equipment casing, etc. Widely used in metal sheets or non-metal plastic, wood, and other sheets, rivet nuts can be firmly fixed on the sheet to provide tight thread locking force. Colour:Color zinc Material:Metal Package Contents: 25 * rivet nuts Only the above package content, other products are not included. Note: Light reflection 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.