Available to make all types of hex coupling. Round coupling and reducing nuts, can be installed with sleeve anchor, wedge anchor and all thread rod, ect. Main Product: Hex Coupling Nuts Meanwhile, we can produce varies non-standard components as drawing, If you're plan to purchase non-standard components, please feel free to contact with us. Size: DIN6334, from M5 to M12 Material: Low/medium carbon steel and stainless steel 201/304/316 are available Finish: Plain, Zinc (White, Yellow, Blue), Black Oxide, Dichromate Dip are available. Grade: 5, 8, 10