... ,DIN,JIS ISO9001-2008,SGS,ROHS 1.The specification of All kinds of cnc part 1)Features:1.Head type: flat/countersunk ... 12.9 FeaturesGood anti-corrosion ability, kinds of coatingsMOQ 50pcsAfter-sale serviceIf there are any quality problems, please contact with us ... knurled screw, aluminum screw, wing screw,etc.Carbon steelMild/medium/high carbon steel, stainless steel, copper, brass, alloy, Aluminum, ...