Qingdao Hitec Hardware Co., Ltd. supplies forged products, specializing in forged couplers, form works, line fittings, hooks, rings and links. All of our products are exported to America and Europe. Our grade 80 products have good quality, strength, and durability. They must undergo fatigue tests 20,000 times to ensure their reliability. We offer more than 15 kinds of line fittings, which also must undergo quality and magnaflux testing. Our couplers are available in US, German, Italian, and ...