... finish: white zinc or yellow zinc or blue zinc or black 1)Name:hexagon bolt or JCBB& JCBC Bolt2)Surface finish ... ,30,35,40,45,50,55,60,65,70,75,80,85,90,100,110,120,130)M8*(16,20,25,30 ... ,35,40,45,50,55,60,65,70,75,80,85,90,100,110,120,130)or:make as customers' requirement5 ...