Material: carbon steel Process: cold heading, tapping Surface: zinc plating ISO certified Standard:GB BS JIS ANSI DIN etc ALL Kind of screwsChipboard screwsDrywall screwsSelf tapping screwsSelf drilling screwsMachine screws Wood screws Material: carton steel sae1008, 1018,1022 or stainless steel 201,304,316Diameter : ST2.5,ST2.9,ST3.5,ST3.9,ST4.2,ST4.8,ST5.5,ST6.3Length:6mm-100mm full thread or ...