... ,6.8,8.8,9.8.... SMALL MACHINE SCREWS,STAINLESS STEEL SCREW,CHIPBOARD SCREW MACHINE SCREW . A good non-standard fastenerS manufacturer for ... ","AB", Threads for chipboard screw,wood screw,drywall screw;Type "M","UNC","UNF","BSW"threads for Machine threads.Head typesHexagon head,Mushroom ... in most of places such as drywall,concrete,chipboard,machine,wood...2) Main export market:North America,South ...