1.Specifications:ss5, ss8, ss23, ss25 2.Standard: uic864-1 (class): normal(low carbon steel), 4.6, 5.6, 8.8 4.Protection: plain, black, zinc plated, hot dip galvanised 5.Application: for both wooden sleeper and concrete sleeper We also manufacture products according to drawings or samples from our customers. The scope include all kinds of fastening, clamping, jointing, insulating and casting products. Such as insulators, plastic or hdpe dowels, joint bars, gauge studs, bolts and nuts, spikes, clips etc.