... 8,10.9 4Certificate:SGS Rail Timber Drive Screw Spike/5/8"*12" galvanized steel spiking >> Specification : DIN, ... according to customers'requirements and drawings. >> thread: 16---36,5/8"--1-3/4" >> length: 60---500 >> Shape ... head: Hexagon head >> Grade: 4.6,4.8,5.6,5.8,6.8,8.8,10.9,12.9 ( ... the Production Permission License from the Ministry of Railways, P.R.China. 2.From 2006, we have manufactured the ...