... and other specifications screw spikesProduct Name: Woonden sleeper screw spikes(rail spike, railroad spike railway fastener)1. Surface treatment: Nuture, black ... Dia: from M16 to M604. Length: unrestricted5. Standards for railway products: T B, UIC , AREA, etc. standard components:GB ... required and approved by clients.8. Head marked with manufacturer ID, Year, length/grade, and other inforamtions if ...