SS410 self drilling screw 1.screw size,ST2.9-ST6.3, 2.length,9.5-150mm 3.certificate,Onsite Check,ISO, 4.din7504k SS410 self drilling screw 1.screw size,ST2 ... ,4.din7504kProductyellow zinc plated hex flange screwMaterialStailess steel SS316,SS304,SS410,carbon steelFinishPassivation,Chromium-Plating,Black Oxide, Zinc-Plating,HDGSizeST2.9 ...