... Screw 2.Material: steel 3.Diameter: 4.2mm Truss Head Phil Self-Drilling Screw 1) Standard: DIN, ANSI, ISO, GB2) Material: Carbon ... : 4.2mm4) Length: 13-75mm5) Slot: phil6) Head: truss7) Thread: UNC, UNF8) Point: self-drilling9) Finish: plain, zinc, black phosphated, grey phosphated ...