[Size] The thread insert has an internal thread M6x1.0mm and external thread M8x1.25mm with a small groove. This is a integrated thread set designed to prevent screw loosening, ideal for applications requiring high safety factors. [] The reducer nut is made of high-quality stainless steel, offering high hardness, strength, and resistance to deformation, ensuring reliable and stable performance of the thread inserts. This thread repair kit includes 20 thread inserts. These self-tapping inserts can be installed directly without pre-threading. Secure fit, resistant to falling off. [International Standard] This thread insert is manufactured under strict quality standards for high performance. Designed and produced in accordance with international standards, following strict factory quality control procedures. [Wide Range of Applications] Our threaded reducer nuts feature a stable structure, excellent performance, and long service life. Widely used in aerospace, automotive, steam turbines, electronic communications, computers, lighting, molds, machinery, coolers, and other manufacturing industries. Size: 15mm Material: Stainless Steel Color: Silver Package Contents: 20 x Reducing Nuts The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3cm.