... is capable 3.Grade:4.8 ,6.8,8.8,9.8........ WAVE PLATE HEAD SCREW,DOUBLE HEAD SCREW,KNURLED HEAD SCREW A ... scrows are available.such as :Self tapping threads "A","AB", Threads for chipboard screw,wood screw,drywall screw;Type "M","UNC","UNF","BSW"threads for Machine ... market:North America,South America,Eastern Europe,Asia,Western Europe .3) Service:OEM service offered,Design service offered.4) Making ...