... DIN7504 - DIN7504 - N, K, DIN7504 - P series: hex head, flat, round head, huawei head, big flat head drlling screw, these screws or have large inventories! And ... thread diameter # 6 (3.5), 7 # (3.9), 8 # (4.2), 10 # (4.8), 12 # (5.5), 14 # (6.3) can produce ...