... M3-M10 With good quality and pric ITEM NAME:CSK self tapping screwsMaterial:carbon steel, stainless steel 2A,4A, alloy ... 6mm-90mm,1/4"-4"Head type: flat,CSK, pan,hex,truss, ovail and so onDrive type: Phillp, slotted, square ... , Y type,hex socket, no drive and so onFREE SAMPLES wll sent asap ... or visiting on our factory. flat head phillips self tapping screw