... :DIN,GB,ASTM,BS,or by client 2size:5/8"*12" 3grade:4.6,5.6,8.8,10.9 4Certificate:SGS Rail Timber Drive ... >> Shape of head: Hexagon head >> Grade: 4.6,4.8,5.6,5.8,6.8,8.8,10.9,12.9 ( General and High strength) >> Surface ... being used. We exported to world markets, such as U.S.A., Canada, Cuba, Germany, Japan, Singapore, Malaysia and Africa and ...