... drilling tapping screws Material: carbon steel Size: M2.9-M6.35 Finish: zinc, nikel, cr, black Self drilling tapping screws StandardsISO, DIN ... , AS/NZS, GB, ANSI , BS JISMaterialStainless steel, carbon steel, alloy steel,copper/brassSizeSt2.9-ST8, ... countersunk head,flat headGrade 4.8 8.8 10.9 12.9FeaturesGood anti-corrosion ability, kinds of coatingsMOQ 100kgsAfter ...