... GB,ASTM,BS,or by client 2size:5/8"*12" 3grade:4.6,5.6,8.8,10. ... 9 4Certificate:SGS Rail Timber Drive Screw Spike/5/8"*12" galvanized steel spiking >> Specification : DIN,GB ANSI/ASME ... 8.8,10.9,12.9 ( General and High strength) >> Surface treatment: plain, black, zinc, electro galvanize, hot dipgalvanization, ... equipmentsWorkshop Welcome your visit! Railway 5/8"*12" galvanized steel twist spiking