... strength bolts for rail bridges etc.3, Various type and sizes of tie plates, clamps, fastenings, ... .high strength track shoe bolt 2.Heat flush bolt3.40Cr Bolt4.excavator and bulldozer track ... A4 Inch.size: Gr2, Gr5,Gr8, A307Surface: SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMENTMaterials: ... '' 5.High tensile Description(TC bolt) Torshear type high strength bolts for steel structureMaterialAlloy steel ,carbon ...