self drilling screw C1022 drive: combination,philips, pozi, slotted finish: black, grey phosphated,yellow,blue white zinc 1. product: self drilling screw2. material : C10223. drive: combination,philips, pozi, slotted4. thread type : coarse, fine , wing teks5. head type: pan, countersunk,wafer,hex washer, pan framing,bugle6. diameter: 3.5mm, 3.9mm,4.8mm,5.5mm,6.3mm7. finish: black, grey phosphated ...