DT Fasteners is also a hex coupling nut factory providing reliable production of hexagon coupling nuts. In recent years, hexagonal coupling nut has been widely used, and the common hexagon coupling nuts are ANSI/ASME B 18.2.2, etc. You can find the existence of hexagonal coupling nuts widely in steel structure construction, machinery industry, and oil pipelines.
ANSI/ASME B 18.2.2 - 2010 Hex Coupling Nuts