... Chrome Plated Hardness: 40Hrc Min 1. Standard of Hex Socket Bolt: DIN912,ANSI,BS,AS,etc.2. Material of ... steel.Q235,Q195,1008,40Cr3. Grade of Hex Socket Bolt: Metric size from Grade4.8 to Grade 12 ... .9, Inch size from Grade2 to Grade10.4. Size of Hex Socket Bolt: diameter from M4 to M20 or ... Surafce Finish of Hex Socket Bolt: plain, black, zinc plated, H.D.G,etc.6. Packing of Hex Socket Bolt: Socket Bolt