... :ST2.2-ST9.5, #0-#18 2.Screw material:C1022, C1018 3.MOQ:30000PCS 4.FOB shenzhen:1- ... Tapping Screws A.Tapping screws specifications 1.Screw size:ST2.2-ST9.5, #0-#182.Screw material:C1022, C1018, C1010 low carbon ... systems:philips, hex socket, hex flange head, slotted, square drive5.Screw thread type:UNC, UFC, hi-low,double thread6.Surface Hardness:45 ...