... Material:C1022 3.Thread:Fine/Coarse 4.Finsh:Black/grey phosphating,Z/P Black phosphating coarse thread drywall screws Products Details: ... Head type: Bugle head, phillips drive, Drilling point Finish: Black/grey phosphate or zinc plated Quality: High-quality raw material ... Main Makets: Our company's major export markets in North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid ...