... Size: M2.9-M6.35 Finish: zinc, nikel, cr, black Self drilling tapping screws StandardsISO, DIN, AS/NZS, GB, ANSI , BS JISMaterialStainless steel, ... alloy steel,copper/brassSizeSt2.9-ST8,or as request Types of head hex head,hex flange head,oval,countersunk head,flat ... 8 8.8 10.9 12.9FeaturesGood anti-corrosion ability, kinds of coatingsMOQ 100kgsAfter-sale serviceIf there are any quality problems, ...