... screw spike 1.Standard:GB10487-89 2.Application:railway, wooden pillow 3.Certificate:ISO9001:2008 Rail screw spike:MaterialQ235, 35# ,45 ... / 5.6/ 8.8/ 10.6/ 12.9StandardTB/T564-92ApplicationWooden pillow, 50kg/m 60kg/m railFinish codePlain, zinc-plated, Dacromet, Multiple ...