Our factory specializes in manufacture of helicoil thread inserts and the associated tools as well as metal piston rings. We have certified by ISO9001-2000 international quality authorization in 2002. and draw up and compiled the first national standard of screw thread inserts, which formally issued on Mar. 1st, 2010. Our products are widely used in military field, such as the ?Shenzhou VI? ?Shenzhou VII? aircraft, ?Chang?e I? satellite, and launch vehicles, missiles, etc. the quality is in leader position. With years of hard work, we have got more than 20 national patents. We offer parts for many military enterprises, including Beijing satellite manufacture Factory, Shanghai spaceflight manufacture Factory, China Academy of Launch Vehicle Technology, Beijing Xinghang Mechanical-electrical Equipment Factory, Spaceflight Long March Launch Vehicle Technology Co., Ltd. Xi?an Aero-engine Group Ltd. and so on.