We&＃039;re backed by well-known Shanghai Great Wall High Strength Bolts Research Institute and first rated manufacturing facilities in China, and specialized in developing, producing and distributing High strength Rivets/Bolts equivalent to Huck C50L series, with sales office in China and HongKong. Technical values of our products ( carbon steel or stainless steel) is equivalent or even exceed the US Military standard(US MIL-P-23469D). A series of Rivet Pumps and special testing instruments are also developed to meet the needs of our customers for installation and testing purposes, some of which are PATENTED products. Our factory is also specialized in producing all kinds of High Strength Bolts for Wind Power applications.