... spiking: 1standard:DIN,GB,ASTM,BS,or by client 2size:5/8"*12" 3grade:4.6,5.6,8.8 ... 9 4Certificate:SGS Rail Timber Drive Screw Spike/5/8"*12" galvanized steel spiking >> Specification : DIN,GB ANSI ... ,5.6,5.8,6.8,8.8,10.9,12.9 ( General and High strength) >> Surface treatment: ... is specializing in producing railway fasteners. We have certified by ISO9001:2008 Quality Management System and got the Production ...