... Description:DIN 7504 Hex Head Self-tapping Screw MATERIAL: carbon steel, stainless steel HEAD STYLES: hex washer, pan, round ... washer, flat, countersunk /csk, oval, truss, pan framming, hexagon flange, bugle, wafer, hinge, binding, button, etc SCREW ... DRIVERS: PHILLIPS, SLOTTED, SQUARE, HEXAGON /Hex, etc SIZE: #6, #7, # ...