Philips Drive Truss Washer Head Drilling Screw a) Material: Carbon Steel b) Dia, # ... Drilling Screw, Self Drilling Tek Screw, Truss Washer Head Self Drill ScrewSpecification Self Drilling ScrewMaterialCarbon Steel(1022,1018), SUS(302,304,316,410)DiameterM3.5 ... - M6.3 (#6-#14)Length6.5 ...