Thread Size: M8 x 1.25mm; Drill Hole Size: 11mm / 0.43 inch; Fastener Type: Hollow Mechanical internal thread, uniform wall thickness, surface treatment, corrosion resistance, and high strength. Drill a hole according to the rivet nut installation size, insert the rivet nut, and tighten the locking nut using a rivet tool. Ideal for use in sheet metal, household thin iron cabinets, roofing, equipment enclosures, and similar applications. Suitable for metal sheets or non-metal materials such as plastic and wood. Rivet nuts can be securely fixed to provide strong thread locking force. Color: Color zinc Material: Metal Package Contents: 25 x Rivet Nuts Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.