[Size] The thread insert has an internal thread M6x1.0mm and external thread M8x1.25mm with a small groove. This is a integrated thread insert set designed to prevent loosening of screws, ideal for applications requiring high reliability. [] The reducer nut is made from high-quality stainless steel, offering high hardness, strength, and resistance to deformation, ensuring reliable and stable performance of the thread inserts. The thread insert is an effective solution for thread repair. The set includes 20 thread inserts. These self-tapping inserts can be installed directly without pre-threading. Once installed, they remain secure and will not loosen or fall off. [International Standard] This thread insert is manufactured to high performance standards. It is designed and produced according to international standards, with strict factory quality control processes in place. [Wide Range of Applications] Our threaded reducer nuts feature a stable structure, excellent performance, and long service life. They are widely used in aerospace, automotive, turbine, electronic communication, computer, mold, machinery, cooler, and other manufacturing industries. Size: 15mm Material: Stainless Steel Color: Silver Package Contents: 20 x Reducing 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 allows an error of +/- 1-3cm.