1) Produce T type screw,sleeper screw,rail product 2) Supply ... your drawings or samples9/16*5-1/2 ''3/8''*3-1/2 ''1/2*3-1/214*14*15016*16*16515. ... 9*139.7Other kinds5Bolts and NutsMany kinds are available 6Spring washer/Flat washersleeper screw,T type ... screwrailway fastening,fishtail bolt,railway project,railroad ties,railroad fastening system T type screw/sleeper ...