... and other specifications screw spikesProduct Name: Woonden sleeper screw spikes(rail spike, railroad spike railway fastener)1. Surface treatment: Nuture, black, pot ... .93. Dia: from M16 to M604. Length: unrestricted5. Standards for railway products: T B, UIC , AREA, etc. standard components:GB,DIN ... kinds available according to the drawings and samples of clients. Railway Screw Spike