... Steel b) Dia: #6-#14(M3.5-M6.3) c) OEM OK Self Drilling ScrewSelf Drilling Screws, also known as Tek screws ... duty steel to steel#6>12MMCustomized for thicker application Specification Self Drilling ScrewMaterialCarbon Steel(1022,1018), SUS(302,304,316,410 ... )DiameterM3.5 - M6.3 (#6-#14)Length6.5 -150mm (1/4''-6'')Thread CodeAB Type, A TypeHead CodeHex Head, Pan Head ...