... .8,10.9 4Certificate:SGS Rail Timber Drive Screw Spike/5/8"*12" galvanized steel spiking >> Specification : DIN,GB ... or according to customers'requirements and drawings. >> thread: 16---36,5/8"--1-3/4" >> length: 60---500 >> Shape of ... head: Hexagon head >> Grade: 4.6,4.8,5.6,5.8,6.8,8.8,10.9,12.9 ( ... products of high speed railway and now they are being used. We exported to world markets, such as U.S ...