1) Produce T type screw,sleeper screw,rail product 2) Supply according to your drawing ... kindsConventional SpikeSquare 16*165Other kinds TypeSpecification Weight/kg SurfaceStandard 3Sleeper Screw Ss 1/120M22*120·Zinc, Plain, Oil, Black ... Flat washersleeper screw,T type screwrailway fastening,fishtail bolt,railway project,railroad ties,railroad fastening system T type screw/sleeper screw/rail products