Steel screw threaded sleeve With NC machining As ... a lot of material, such as ductile iron, stainless steel, aluminum, brass etc. We have supplied good quality products ... good reputation. For the specification of Steel screw threaded sleeve: 1. Material: Different steel series and iron series.2. Process ... .Rm. A&B,16/F,Unit A, King Office Building,No.9 Fuxi Street, Taiyuan, Shanxi, China.030002Tel: 0086 ...