WAVE PLATE HEAD SCREW 1.ISO,ANSI,JIS,DIN,BS& non-standard fastener supply 2.ROHS is capable ... 3.Grade:4.8 ,6.8,8.8,9.8........ WAVE PLATE HEAD SCREW,DOUBLE HEAD SCREW ... threads "A","AB", Threads for chipboard screw,wood screw,drywall screw;Type "M","UNC","UNF","BSW"threads for ... and more than 100 equipment to produce fastener.Perfect quality 1.The material are always ...