... ,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 ... Shape of head: Hexagon head >> Grade: 4.6,4.8,5.6,5.8,6.8,8.8,10.9,12.9 ( General and ... figures: PackagingFactory viewTesting equipmentsWorkshop Welcome your visit! Railway 5/8"*12" galvanized steel twist spiking