To protect the threads and sealing when used in handling, transportation and storage and hub caps Bashan production thread protectors, the plastic parts we call it a rib protector, of course, various sizes of thread protectors, metallic material can be done thread protectors, but due to the high cost, only on sophisticated products to protect. sleeve screw screwthread on a cylindrical or conical surface of the parent out of the helical system, with a specific section of the continuous convex portion. Its parent shape into cylindrical threaded screw and conical thread; its cross-sectional shape (tooth type) into the thread triangle, rectangle thread, trapezoidal thread, serrated screw thread and other special shapes, triangle thread is mainly used for connection, rectangular, trapezoid thread and serrated main ... Bashan production thread protectors, positive Tong machinery, thread protectors provided by Ning County is Tong Machinery Plastic Limited. Ning County is Tong Machinery Plastic Co., Ltd. (www.dzztjx.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!