1,DIN912 Hexagon Socket Head Cap Screw standard 2,Competitive price 3,Fast delivery time 4,Nice quality Hex Socket Hexagon Socket Head Cap Screw DIN9121.Material: carbon steel 2.Sizes: M3-M243.Grade: Grade8.8, 12.94.Standard: ISO,GB,DIN,JIS,ANSI5.Surface:plain,zinc plated, black, yellow zinc plated6.Packing:bulk packing, small boxes,color box Carbon Steel DIN912 Hexagon Socket Head Cap Screw