System 300-S rail fastening system with SKL-15 clamp is designed & developed in India and compliant with Category-B and Category-C of EN 13481-5 Standard, with a maximum permissible axle load of 26 tons. This direct fastening system transfers load efficiently to base structure, putting less loads on the spike anchor and with large base pad performs on par with indirect fastenings. 

The canted cellular base plate is profiled to hold the rubber pads in position under vibrations and the clamps in rest and fix position. Base plate accommodates the eccentric angle guide bush (AGB), which transfers transverse loads to surrounding confined concrete through wide mouth dowel (WMD) and has an in-built provision to adjust the gauge up to ± 5mm in service and to lock the gauge in place and the rail alignment. Eccentric bush does away with multiple sizes of AGPs and failure-prone concrete humps required in other type of 300 systems, thus reducing inventory and complicated geometry of track structure.