[Size]The thread insert has internal thread M6x1.0mm, external thread M8x1.25mm and has a small groove. This is a brand new integrated thread set that can prevent loosening of screws, especially for that require high insurance coefficients. [High quality material]The reducer nut uses high quality stainless steel, high hardness, strength and not easy to straighten, to the reliability and stability of thread inserts. The thread insert is an effective tool for thread repair, including 20 thread inserts. These self-tapping thread inserts can be mounted directly without screwing in the thread beforehand. No need to change, not easily fall off. [ Standard] This thread insert is authorized according to rules with high performance. The insert is designed and manufactured according to standard, strictly follow the quality control of the factory. [Wide range of applications]Our threaded reducer nuts have a stable structure, excellent performance and a long service life. They are widely used in aerospace, automobiles, steam turbines, electronic communications, computers, lamps, , mechanical equipment, coolers and other manufacturing fields size: 15mm Material: Stainless steel colour: silver Package Contents: 20 x Reducing Nuts Only the above package content, other 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.