Pan Philips Head Machine Screw with Zinc Plating Head tye: CSK/flat ... to 300mmDiameter of thread: M3 to M6.3Head recess: Philips 4 ribbs, Pozi, Philips, HWF undercut, HWH, Serration, flower head and othersPlating ... , RoHS report, and we also pass the by inspection Pan Philips Head Screw