... 13mm ~ 254mm (1/2" - 10"). Finish: Plain, zinc plated, galvanized, nickel plated. Black Standard model: DIN, GB, ISO, ANSI, ASME ... Coating: Plain, zinc plated, galvanized, nickel plated. BlackWe can supply you with full kinds of fasteners, and we can also ... excellent reputation, over 20 years export experience and specialist of our products. We deliver over ... Pan Head Self-Drilling Screws Zinc Plated